diff --git a/Makefile b/Makefile
index eec3abde..fb99f882 100644
--- a/Makefile
+++ b/Makefile
@@ -61,10 +61,11 @@ ifdef ARCH_WIN
 	TARGET := libRack.dll
 
 	SOURCES += dep/osdialog/osdialog_win.c
+	LDFLAGS += -municode
 	LDFLAGS += -Wl,--export-all-symbols
 	LDFLAGS += -Wl,--out-implib,$(TARGET).a
 	LDFLAGS += -Wl,-Bstatic -Wl,--whole-archive
-	LDFLAGS += dep/lib/libglew32.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libzip.a dep/lib/libz.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/librtaudio.a dep/lib/librtmidi.a
+	LDFLAGS += dep/lib/libglew32.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libzip.a dep/lib/libz.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/librtaudio.a dep/lib/librtmidi.a -lstdc++fs
 	LDFLAGS += -Wl,-Bdynamic -Wl,--no-whole-archive
 	LDFLAGS += -lpthread -lopengl32 -lgdi32 -lws2_32 -lcomdlg32 -lole32 -ldsound -lwinmm -lksuser -lshlwapi -lmfplat -lmfuuid -lwmcodecdspuuid -ldbghelp
 
diff --git a/include/common.hpp b/include/common.hpp
index 5394efc3..604cdacd 100644
--- a/include/common.hpp
+++ b/include/common.hpp
@@ -201,22 +201,22 @@ extern const std::string API_VERSION;
 
 #if defined ARCH_WIN
 // wchar_t on Windows should be 2 bytes
-static_assert(sizeof(char16_t) == sizeof(wchar_t));
+static_assert(sizeof(wchar_t) == 2);
 
 // Windows C standard functions are ASCII-8 instead of UTF-8, so redirect these functions to wrappers which convert to UTF-8
-#define fopen fopen_utf8
-#define remove remove_utf8
-#define rename rename_utf8
+#define fopen fopen_u8
+#define remove remove_u8
+#define rename rename_u8
 
 extern "C" {
-FILE* fopen_utf8(const char* filename, const char* mode);
-int remove_utf8(const char* path);
-int rename_utf8(const char* oldname, const char* newname);
+FILE* fopen_u8(const char* filename, const char* mode);
+int remove_u8(const char* path);
+int rename_u8(const char* oldname, const char* newname);
 }
 
 namespace std {
-	using ::fopen_utf8;
-	using ::remove_utf8;
-	using ::rename_utf8;
+	using ::fopen_u8;
+	using ::remove_u8;
+	using ::rename_u8;
 }
 #endif
diff --git a/include/patch.hpp b/include/patch.hpp
index 8e7850a9..460d10e9 100644
--- a/include/patch.hpp
+++ b/include/patch.hpp
@@ -29,7 +29,7 @@ struct PatchManager {
 	/** Loads a patch and nothing else.
 	Returns whether the patch was loaded successfully.
 	*/
-	bool load(std::string path);
+	void load(std::string path);
 	/** Loads the template patch. */
 	void loadTemplate();
 	void loadTemplateDialog();
diff --git a/include/string.hpp b/include/string.hpp
index 2a3a2e6c..4346011e 100644
--- a/include/string.hpp
+++ b/include/string.hpp
@@ -89,9 +89,12 @@ struct CaseInsensitiveCompare {
 #if defined ARCH_WIN
 /** Performs a Unicode string conversion from UTF-16 to UTF-8.
 These are only defined on Windows because the implementation uses Windows' API, and conversion is not needed on other OS's (since everything on Mac and Linux is UTF-8).
+
+std::string and char* variables are considered UTF-8, anywhere in the program.
+See https://utf8everywhere.org/ for more information about VCV Rack's philosophy on string encoding, especially section 10 for rules VCV follows for handling text on Windows.
 */
-std::string UTF16toUTF8(const std::u16string& s);
-std::u16string UTF8toUTF16(const std::string& s);
+std::string U16toU8(const std::wstring& w);
+std::wstring U8toU16(const std::string& s);
 #endif
 
 } // namespace string
diff --git a/include/system.hpp b/include/system.hpp
index 12c30002..c915c89d 100644
--- a/include/system.hpp
+++ b/include/system.hpp
@@ -69,11 +69,19 @@ The launched process will continue running if the current process is closed.
 */
 void runProcessDetached(const std::string& path);
 std::string getOperatingSystemInfo();
-/** Extracts an archive into a folder.
+/** Compresses the contents of a folder (recursively) to an archive.
 Currently supports the "ustar zstd" format (.tar.zstd)
+An equivalent shell command is
+
+	tar -cf archivePath --zstd -C folderPath .
 */
-void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::path& folderPath);
 void archiveFolder(const filesystem::path& archivePath, const filesystem::path& folderPath);
+/** Extracts an archive into a folder.
+An equivalent shell command is
+
+	tar -xf archivePath --zstd -C folderPath
+*/
+void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::path& folderPath);
 
 
 } // namespace system
diff --git a/src/asset.cpp b/src/asset.cpp
index d2c2906b..36be9175 100644
--- a/src/asset.cpp
+++ b/src/asset.cpp
@@ -61,12 +61,12 @@ static void initSystemDir() {
 #endif
 #if defined ARCH_WIN
 	// Get path to executable
-	char16_t moduleBufU16[MAX_PATH] = u"";
-	DWORD length = GetModuleFileNameW(NULL, (wchar_t*) moduleBufU16, LENGTHOF(moduleBufU16));
+	wchar_t moduleBufW[MAX_PATH] = L"";
+	DWORD length = GetModuleFileNameW(NULL, moduleBufW, LENGTHOF(moduleBufW));
 	assert(length > 0);
 	// Get folder of executable
-	PathRemoveFileSpecW((wchar_t*) moduleBufU16);
-	systemDir = string::UTF16toUTF8(moduleBufU16);
+	PathRemoveFileSpecW(moduleBufW);
+	systemDir = string::U16toU8(moduleBufW);
 #endif
 #if defined ARCH_LIN
 	// Use the current working directory as the default path on Linux.
@@ -86,10 +86,10 @@ static void initUserDir() {
 
 #if defined ARCH_WIN
 	// Get "My Documents" folder
-	char16_t documentsBufU16[MAX_PATH] = u".";
-	HRESULT result = SHGetFolderPathW(NULL, CSIDL_MYDOCUMENTS, NULL, SHGFP_TYPE_CURRENT, (wchar_t*) documentsBufU16);
+	wchar_t documentsBufW[MAX_PATH] = L".";
+	HRESULT result = SHGetFolderPathW(NULL, CSIDL_MYDOCUMENTS, NULL, SHGFP_TYPE_CURRENT, documentsBufW);
 	assert(result == S_OK);
-	userDir = string::UTF16toUTF8(documentsBufU16);
+	userDir = string::U16toU8(documentsBufW);
 	userDir += "/Rack";
 #endif
 #if defined ARCH_MAC
diff --git a/src/common.cpp b/src/common.cpp
index 8ee9ed98..7a5f638b 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -27,16 +27,16 @@ const std::string API_VERSION = "2";
 #if defined ARCH_WIN
 #include <windows.h>
 
-FILE* fopen_utf8(const char* filename, const char* mode) {
-	return _wfopen((wchar_t*) rack::string::UTF8toUTF16(filename).c_str(), (wchar_t*) rack::string::UTF8toUTF16(mode).c_str());
+FILE* fopen_u8(const char* filename, const char* mode) {
+	return _wfopen(rack::string::U8toU16(filename).c_str(), rack::string::U8toU16(mode).c_str());
 }
 
-int remove_utf8(const char* path) {
-	return _wremove((wchar_t*) rack::string::UTF8toUTF16(path).c_str());
+int remove_u8(const char* path) {
+	return _wremove(rack::string::U8toU16(path).c_str());
 }
 
-int rename_utf8(const char* oldname, const char* newname) {
-	return _wrename((wchar_t*) rack::string::UTF8toUTF16(oldname).c_str(), (wchar_t*) rack::string::UTF8toUTF16(newname).c_str());
+int rename_u8(const char* oldname, const char* newname) {
+	return _wrename(rack::string::U8toU16(oldname).c_str(), rack::string::U8toU16(newname).c_str());
 }
 
 #endif
diff --git a/src/patch.cpp b/src/patch.cpp
index 6eb7192a..1a6d4fc9 100644
--- a/src/patch.cpp
+++ b/src/patch.cpp
@@ -55,17 +55,24 @@ void PatchManager::save(std::string path) {
 	INFO("Saving patch %s", path.c_str());
 	saveAutosave();
 
-	system::archiveFolder(path, asset::autosavePath);
+	system::archiveFolder(filesystem::u8path(path), asset::autosavePath);
 }
 
 void PatchManager::saveDialog() {
 	if (path == "") {
 		saveAsDialog();
+		return;
 	}
-	else {
+
+	try {
 		save(path);
-		APP->history->setSaved();
 	}
+	catch (Exception& e) {
+		WARN("Could not save patch: %s", e.what());
+		return;
+	}
+
+	APP->history->setSaved();
 }
 
 void PatchManager::saveAsDialog() {
@@ -100,7 +107,14 @@ void PatchManager::saveAsDialog() {
 		path += ".vcv";
 	}
 
-	save(path);
+	try {
+		save(path);
+	}
+	catch (Exception& e) {
+		WARN("Could not save patch: %s", e.what());
+		return;
+	}
+
 	this->path = path;
 	APP->history->setSaved();
 	pushRecentPath(path);
@@ -111,7 +125,13 @@ void PatchManager::saveTemplateDialog() {
 	if (!osdialog_message(OSDIALOG_INFO, OSDIALOG_OK_CANCEL, "Overwrite template patch?"))
 		return;
 
-	save(asset::templatePath);
+	try {
+		save(asset::templatePath);
+	}
+	catch (Exception& e) {
+		WARN("Could not save template patch: %s", e.what());
+		return;
+	}
 }
 
 void PatchManager::saveAutosave() {
@@ -138,28 +158,35 @@ void PatchManager::saveAutosave() {
 	system::moveFile(tmpPath, patchPath);
 }
 
-bool PatchManager::load(std::string path) {
+void PatchManager::load(std::string path) {
 	INFO("Loading patch %s", path.c_str());
 
 	filesystem::remove_all(asset::autosavePath);
 	filesystem::create_directories(asset::autosavePath);
-	system::unarchiveToFolder(path, asset::autosavePath);
+	system::unarchiveToFolder(filesystem::u8path(path), asset::autosavePath);
 
 	loadAutosave();
-	return true;
 }
 
 void PatchManager::loadTemplate() {
 	this->path = "";
 	APP->history->setSaved();
 
-	if (load(asset::templatePath)) {
+	try {
+		load(asset::templatePath);
 		return;
 	}
+	catch (Exception& e) {
+		INFO("Could not load user template patch, attempting system template patch: %s", e.what());
+	}
 
-	if (load(asset::system("template.vcv"))) {
+	try {
+		load(asset::system("template.vcv"));
 		return;
 	}
+	catch (Exception& e) {
+		WARN("Could not load system template patch, clearing rack: %s", e.what());
+	}
 
 	clear();
 }
@@ -199,9 +226,14 @@ void PatchManager::loadAutosave() {
 }
 
 void PatchManager::loadAction(std::string path) {
-	if (!load(path)) {
+	try {
+		load(path);
+	}
+	catch (Exception& e) {
+		WARN("Could not load patch: %s", e.what());
 		return;
 	}
+
 	this->path = path;
 	APP->history->setSaved();
 	pushRecentPath(path);
@@ -249,7 +281,14 @@ void PatchManager::revertDialog() {
 	if (!promptClear("Revert patch to the last saved state?"))
 		return;
 
-	load(path);
+	try {
+		load(path);
+	}
+	catch (Exception& e) {
+		WARN("Could not load patch: %s", e.what());
+		return;
+	}
+
 	APP->history->setSaved();
 }
 
diff --git a/src/plugin.cpp b/src/plugin.cpp
index b07acd37..e9286e90 100644
--- a/src/plugin.cpp
+++ b/src/plugin.cpp
@@ -46,8 +46,8 @@ namespace plugin {
 static void* loadLibrary(std::string libraryPath) {
 	#if defined ARCH_WIN
 		SetErrorMode(SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
-		std::u16string libraryFilenameU16 = string::UTF8toUTF16(libraryPath);
-		HINSTANCE handle = LoadLibraryW((wchar_t*) libraryFilenameU16.c_str());
+		std::wstring libraryFilenameW = string::U8toU16(libraryPath);
+		HINSTANCE handle = LoadLibraryW(libraryFilenameW.c_str());
 		SetErrorMode(0);
 		if (!handle) {
 			int error = GetLastError();
diff --git a/src/string.cpp b/src/string.cpp
index f90abe43..d8b58316 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -127,11 +127,11 @@ std::string absolutePath(const std::string& path) {
 	if (absPathC)
 		return absPathC;
 #elif defined ARCH_WIN
-	std::u16string pathU16 = UTF8toUTF16(path);
-	char16_t buf[PATH_MAX];
-	char16_t* absPathC = (char16_t*) _wfullpath((wchar_t*) buf, (wchar_t*) pathU16.c_str(), PATH_MAX);
+	std::wstring pathW = U8toU16(path);
+	wchar_t buf[PATH_MAX];
+	wchar_t* absPathC = _wfullpath(buf, pathW.c_str(), PATH_MAX);
 	if (absPathC)
-		return UTF16toUTF8(absPathC);
+		return U16toU8(absPathC);
 #endif
 	return "";
 }
@@ -290,33 +290,33 @@ bool CaseInsensitiveCompare::operator()(const std::string& a, const std::string&
 
 
 #if defined ARCH_WIN
-std::string UTF16toUTF8(const std::u16string& sU16) {
-	if (sU16.empty())
+std::string U16toU8(const std::wstring& w) {
+	if (w.empty())
 		return "";
 	// Compute length of output buffer
-	int len = WideCharToMultiByte(CP_UTF8, 0, (wchar_t*) &sU16[0], sU16.size(), NULL, 0, NULL, NULL);
+	int len = WideCharToMultiByte(CP_UTF8, 0, &w[0], w.size(), NULL, 0, NULL, NULL);
 	assert(len > 0);
 	std::string s;
 	// Allocate enough space for null character
 	s.resize(len);
-	len = WideCharToMultiByte(CP_UTF8, 0, (wchar_t*) &sU16[0], sU16.size(), &s[0], len, 0, 0);
+	len = WideCharToMultiByte(CP_UTF8, 0, &w[0], w.size(), &s[0], len, 0, 0);
 	assert(len > 0);
 	return s;
 }
 
 
-std::u16string UTF8toUTF16(const std::string& s) {
+std::wstring U8toU16(const std::string& s) {
 	if (s.empty())
-		return u"";
+		return L"";
 	// Compute length of output buffer
 	int len = MultiByteToWideChar(CP_UTF8, 0, &s[0], s.size(), NULL, 0);
 	assert(len > 0);
-	std::u16string sU16;
+	std::wstring w;
 	// Allocate enough space for null character
-	sU16.resize(len);
-	len = MultiByteToWideChar(CP_UTF8, 0, &s[0], s.size(), (wchar_t*) &sU16[0], len);
+	w.resize(len);
+	len = MultiByteToWideChar(CP_UTF8, 0, &s[0], s.size(), &w[0], len);
 	assert(len > 0);
-	return sU16;
+	return w;
 }
 #endif
 
diff --git a/src/system.cpp b/src/system.cpp
index 88b04655..b842036c 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -132,8 +132,8 @@ void copyFile(const std::string& srcPath, const std::string& destPath) {
 
 void createDirectory(const std::string& path) {
 #if defined ARCH_WIN
-	std::u16string pathU16 = string::UTF8toUTF16(path);
-	_wmkdir((wchar_t*) pathU16.c_str());
+	std::wstring pathW = string::U8toU16(path);
+	_wmkdir(pathW.c_str());
 #else
 	mkdir(path.c_str(), 0755);
 #endif
@@ -152,8 +152,8 @@ void createDirectories(const std::string& path) {
 
 void removeDirectory(const std::string& path) {
 #if defined ARCH_WIN
-	std::u16string pathU16 = string::UTF8toUTF16(path);
-	_wrmdir((wchar_t*) pathU16.c_str());
+	std::wstring pathW = string::U8toU16(path);
+	_wrmdir(pathW.c_str());
 #else
 	rmdir(path.c_str());
 #endif
@@ -172,9 +172,9 @@ void removeDirectories(const std::string& path) {
 
 std::string getWorkingDirectory() {
 #if defined ARCH_WIN
-	char16_t buf[4096] = u"";
-	GetCurrentDirectory(sizeof(buf), (wchar_t*) buf);
-	return string::UTF16toUTF8(buf);
+	wchar_t buf[4096] = L"";
+	GetCurrentDirectory(sizeof(buf), buf);
+	return string::U16toU8(buf);
 #else
 	char buf[4096] = "";
 	getcwd(buf, sizeof(buf));
@@ -185,8 +185,8 @@ std::string getWorkingDirectory() {
 
 void setWorkingDirectory(const std::string& path) {
 #if defined ARCH_WIN
-	std::u16string pathU16 = string::UTF8toUTF16(path);
-	SetCurrentDirectory((wchar_t*) pathU16.c_str());
+	std::wstring pathW = string::U8toU16(path);
+	SetCurrentDirectory(pathW.c_str());
 #else
 	chdir(path.c_str());
 #endif
@@ -303,8 +303,8 @@ void openBrowser(const std::string& url) {
 	std::system(command.c_str());
 #endif
 #if defined ARCH_WIN
-	std::u16string urlW = string::UTF8toUTF16(url);
-	ShellExecuteW(NULL, L"open", (wchar_t*) urlW.c_str(), NULL, NULL, SW_SHOWDEFAULT);
+	std::wstring urlW = string::U8toU16(url);
+	ShellExecuteW(NULL, L"open", urlW.c_str(), NULL, NULL, SW_SHOWDEFAULT);
 #endif
 }
 
@@ -319,8 +319,8 @@ void openFolder(const std::string& path) {
 	std::system(command.c_str());
 #endif
 #if defined ARCH_WIN
-	std::u16string pathU16 = string::UTF8toUTF16(path);
-	ShellExecuteW(NULL, L"explore", (wchar_t*) pathU16.c_str(), NULL, NULL, SW_SHOWDEFAULT);
+	std::wstring pathW = string::U8toU16(path);
+	ShellExecuteW(NULL, L"explore", pathW.c_str(), NULL, NULL, SW_SHOWDEFAULT);
 #endif
 }
 
@@ -332,8 +332,8 @@ void runProcessDetached(const std::string& path) {
 	shExInfo.cbSize = sizeof(shExInfo);
 	shExInfo.lpVerb = L"runas";
 
-	std::u16string pathU16 = string::UTF8toUTF16(path);
-	shExInfo.lpFile = (wchar_t*) pathU16.c_str();
+	std::wstring pathW = string::U8toU16(path);
+	shExInfo.lpFile = pathW.c_str();
 	shExInfo.nShow = SW_SHOW;
 
 	if (ShellExecuteExW(&shExInfo)) {
@@ -430,6 +430,104 @@ int unzipToFolder(const std::string& zipPath, const std::string& dir) {
 }
 
 
+/** Behaves like `std::filesystem::relative()`.
+Limitation: `p` must be a descendant of `base`. Doesn't support adding `../` to the return path.
+*/
+static filesystem::path getRelativePath(filesystem::path p, filesystem::path base = filesystem::current_path()) {
+	p = filesystem::absolute(p);
+	base = filesystem::absolute(base);
+	std::string pStr = p.generic_u8string();
+	std::string baseStr = base.generic_u8string();
+	if (pStr.size() < baseStr.size())
+		throw Exception("getRelativePath() error: path is shorter than base");
+	if (!std::equal(baseStr.begin(), baseStr.end(), pStr.begin()))
+		throw Exception("getRelativePath() error: path does not begin with base");
+
+	// If p == base, this correctly returns "."
+	return "." + std::string(pStr.begin() + baseStr.size(), pStr.end());
+}
+
+
+void archiveFolder(const filesystem::path& archivePath, const filesystem::path& folderPath){
+	// Based on minitar.c create() in libarchive examples
+	int r;
+
+	// Open archive for writing
+	struct archive* a = archive_write_new();
+	DEFER({archive_write_free(a);});
+	archive_write_set_format_ustar(a);
+	archive_write_add_filter_zstd(a);
+#if defined ARCH_WIN
+	r = archive_write_open_filename_w(a, archivePath.generic_wstring().c_str());
+#else
+	r = archive_write_open_filename(a, archivePath.generic_u8string().c_str());
+#endif
+	if (r < ARCHIVE_OK)
+		throw Exception(string::f("archiveFolder() could not open archive %s for writing: %s", archivePath.generic_u8string().c_str(), archive_error_string(a)));
+	DEFER({archive_write_close(a);});
+
+	// Open folder for reading
+	struct archive* disk = archive_read_disk_new();
+	DEFER({archive_read_free(disk);});
+#if defined ARCH_WIN
+	r = archive_read_disk_open_w(disk, folderPath.generic_wstring().c_str());
+#else
+	r = archive_read_disk_open(disk, folderPath.generic_u8string().c_str());
+#endif
+	if (r < ARCHIVE_OK)
+		throw Exception(string::f("archiveFolder() could not open folder %s for reading: %s", folderPath.generic_u8string().c_str(), archive_error_string(a)));
+	DEFER({archive_read_close(a);});
+
+	// Iterate folder
+	for (;;) {
+		struct archive_entry* entry = archive_entry_new();
+		DEFER({archive_entry_free(entry);});
+
+		r = archive_read_next_header2(disk, entry);
+		if (r == ARCHIVE_EOF)
+			break;
+		if (r < ARCHIVE_OK)
+			throw Exception(string::f("archiveFolder() could not get next entry from archive: %s", archive_error_string(disk)));
+
+		// Recurse dirs
+		archive_read_disk_descend(disk);
+
+		// Convert absolute path to relative path
+		filesystem::path entryPath =
+#if defined ARCH_WIN
+			archive_entry_pathname_w(entry);
+#else
+			archive_entry_pathname(entry);
+#endif
+		entryPath = getRelativePath(entryPath, folderPath);
+#if defined ARCH_WIN
+		archive_entry_copy_pathname_w(entry, entryPath.generic_wstring().c_str());
+#else
+		archive_entry_set_pathname(entry, entryPath.generic_u8string().c_str());
+#endif
+
+		// Write file to archive
+		r = archive_write_header(a, entry);
+		if (r < ARCHIVE_OK)
+			throw Exception(string::f("archiveFolder() could not write entry to archive: %s", archive_error_string(a)));
+
+		// Manually copy data
+#if defined ARCH_WIN
+		filesystem::path entrySourcePath = archive_entry_sourcepath_w(entry);
+#else
+		filesystem::path entrySourcePath = archive_entry_sourcepath(entry);
+#endif
+		FILE* f = std::fopen(entrySourcePath.generic_u8string().c_str(), "rb");
+		DEFER({std::fclose(f);});
+		char buf[1 << 14];
+		ssize_t len;
+		while ((len = std::fread(buf, 1, sizeof(buf), f)) > 0) {
+			archive_write_data(a, buf, len);
+		}
+	}
+}
+
+
 void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::path& folderPath) {
 	// Based on minitar.c extract() in libarchive examples
 	int r;
@@ -441,10 +539,14 @@ void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::pa
 	// archive_read_support_filter_all(a);
 	archive_read_support_format_tar(a);
 	// archive_read_support_format_all(a);
-	// TODO Fix unicode filenames on Windows?
-	r = archive_read_open_filename(a, archivePath.c_str(), 1 << 14);
-	if (r != ARCHIVE_OK)
-		throw Exception(string::f("unzipToFolder() could not open archive %s: %s", archivePath.c_str(), archive_error_string(a)));
+	DEBUG("opening %s %s", archivePath.generic_string().c_str(), archivePath.string().c_str());
+#if defined ARCH_WIN
+	r = archive_read_open_filename_w(a, archivePath.generic_wstring().c_str(), 1 << 14);
+#else
+	r = archive_read_open_filename(a, archivePath.generic_u8string().c_str(), 1 << 14);
+#endif
+	if (r < ARCHIVE_OK)
+		throw Exception(string::f("unzipToFolder() could not open archive %s: %s", archivePath.generic_u8string().c_str(), archive_error_string(a)));
 	DEFER({archive_read_close(a);});
 
 	// Open folder for writing
@@ -465,12 +567,16 @@ void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::pa
 		if (r < ARCHIVE_OK)
 			throw Exception(string::f("unzipToFolder() could not read entry from archive: %s", archive_error_string(a)));
 
-		// Set pathname relative to folderPath
-		filesystem::path entryPath = archive_entry_pathname(entry);
+		// Convert relative pathname to absolute based on folderPath
+		filesystem::path entryPath = filesystem::u8path(archive_entry_pathname(entry));
 		if (!entryPath.is_relative())
-			throw Exception(string::f("unzipToFolder() does not support absolute paths: %s", entryPath.c_str()));
+			throw Exception(string::f("unzipToFolder() does not support absolute paths: %s", entryPath.generic_u8string().c_str()));
 		entryPath = filesystem::absolute(entryPath, folderPath);
-		archive_entry_set_pathname(entry, entryPath.c_str());
+#if defined ARCH_WIN
+		archive_entry_copy_pathname_w(entry, entryPath.generic_wstring().c_str());
+#else
+		archive_entry_set_pathname(entry, entryPath.generic_u8string().c_str());
+#endif
 
 		// Write entry to disk
 		r = archive_write_header(disk, entry);
@@ -503,81 +609,5 @@ void unarchiveToFolder(const filesystem::path& archivePath, const filesystem::pa
 }
 
 
-/** Behaves like `std::filesystem::relative()`.
-Limitation: `p` must be a descendant of `base`. Doesn't support adding `../` to the return path.
-*/
-static filesystem::path getRelativePath(filesystem::path p, filesystem::path base = filesystem::current_path()) {
-	p = filesystem::absolute(p);
-	base = filesystem::absolute(base);
-	std::string pStr = p;
-	std::string baseStr = base;
-	if (pStr.size() < baseStr.size())
-		throw Exception("getRelativePath() error: path is shorter than base");
-	if (!std::equal(baseStr.begin(), baseStr.end(), pStr.begin()))
-		throw Exception("getRelativePath() error: path does not begin with base");
-
-	// If p == base, this correctly returns "."
-	return "." + std::string(pStr.begin() + baseStr.size(), pStr.end());
-}
-
-
-void archiveFolder(const filesystem::path& archivePath, const filesystem::path& folderPath){
-	// Based on minitar.c create() in libarchive examples
-	int r;
-
-	// Open archive for writing
-	struct archive* a = archive_write_new();
-	DEFER({archive_write_free(a);});
-	archive_write_set_format_ustar(a);
-	archive_write_add_filter_zstd(a);
-	r = archive_write_open_filename(a, archivePath.c_str());
-	if (r != ARCHIVE_OK)
-		throw Exception(string::f("archiveFolder() could not open archive %s for writing: %s", archivePath.c_str(), archive_error_string(a)));
-	DEFER({archive_write_close(a);});
-
-	// Open folder for reading
-	struct archive* disk = archive_read_disk_new();
-	DEFER({archive_read_free(disk);});
-	r = archive_read_disk_open(disk, folderPath.c_str());
-	if (r != ARCHIVE_OK)
-		throw Exception(string::f("archiveFolder() could not open folder %s for reading: %s", folderPath.c_str(), archive_error_string(a)));
-	DEFER({archive_read_close(a);});
-
-	// Iterate folder
-	for (;;) {
-		struct archive_entry* entry = archive_entry_new();
-		DEFER({archive_entry_free(entry);});
-
-		r = archive_read_next_header2(disk, entry);
-		if (r == ARCHIVE_EOF)
-			break;
-		if (r != ARCHIVE_OK)
-			throw Exception(string::f("archiveFolder() could not get next entry from archive: %s", archive_error_string(disk)));
-
-		// Recurse dirs
-		archive_read_disk_descend(disk);
-
-		// Convert absolute path to relative path
-		filesystem::path entryPath = archive_entry_pathname(entry);
-		entryPath = getRelativePath(entryPath, folderPath);
-		archive_entry_set_pathname(entry, entryPath.c_str());
-
-		// Write file to archive
-		r = archive_write_header(a, entry);
-		if (r != ARCHIVE_OK)
-			throw Exception("archiveFolder() could not write entry to archive");
-
-		// Manually copy data
-		FILE* f = std::fopen(archive_entry_sourcepath(entry), "rb");
-		DEFER({std::fclose(f);});
-		static char buf[1 << 14];
-		ssize_t len;
-		while ((len = std::fread(buf, 1, sizeof(buf), f)) > 0) {
-			archive_write_data(a, buf, len);
-		}
-	}
-}
-
-
 } // namespace system
 } // namespace rack
diff --git a/standalone/main.cpp b/standalone/main.cpp
index b42238d7..1efc7c9b 100644
--- a/standalone/main.cpp
+++ b/standalone/main.cpp
@@ -56,11 +56,12 @@ static void fatalSignalHandler(int sig) {
 }
 
 
+// TODO Use -municode on Windows and change this to wmain. Convert argv to UTF-8.
 int main(int argc, char* argv[]) {
 #if defined ARCH_WIN
 	// Windows global mutex to prevent multiple instances
 	// Handle will be closed by Windows when the process ends
-	HANDLE instanceMutex = CreateMutexW(NULL, true, (wchar_t*) string::UTF8toUTF16(APP_NAME).c_str());
+	HANDLE instanceMutex = CreateMutexW(NULL, true, string::U8toU16(APP_NAME).c_str());
 	if (GetLastError() == ERROR_ALREADY_EXISTS) {
 		osdialog_message(OSDIALOG_ERROR, OSDIALOG_OK, "Rack is already running. Multiple Rack instances are not supported.");
 		exit(1);