Make the license more clear

Signed-off-by: falkTX <falktx@falktx.com>

plugins/Common/IldaeilPlugin.cpp

@@ -4,7 +4,7 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 3 of
+ * published by the Free Software Foundation; either version 2 of
  * the License, or any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -170,7 +170,7 @@ protected:
     */
     const char* getLicense() const override
     {
-        return "ISC";
+        return "GPLv2+";
     }
 
    /**

plugins/Common/IldaeilUI.cpp

@@ -4,7 +4,7 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 3 of
+ * published by the Free Software Foundation; either version 2 of
  * the License, or any later version.
  *
  * This program is distributed in the hope that it will be useful,

plugins/FX/DistrhoPluginInfo.h

@@ -4,7 +4,7 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 3 of
+ * published by the Free Software Foundation; either version 2 of
  * the License, or any later version.
  *
  * This program is distributed in the hope that it will be useful,

plugins/MIDI/DistrhoPluginInfo.h

@@ -4,7 +4,7 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 3 of
+ * published by the Free Software Foundation; either version 2 of
  * the License, or any later version.
  *
  * This program is distributed in the hope that it will be useful,

plugins/Synth/DistrhoPluginInfo.h

@@ -4,7 +4,7 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 3 of
+ * published by the Free Software Foundation; either version 2 of
  * the License, or any later version.
  *
  * This program is distributed in the hope that it will be useful,