addon.xml and LICENSE.txt mention GPL v2 (or later), but addon.py mentions GPL v3 (or later). I don't know which license you intended to use, but you should probably make those three aforementioned places consistently refer to either GPL v2 or v3 (or later).
addon.xml and LICENSE.txt mention GPL v2 (or later), but addon.py mentions GPL v3 (or later). I don't know which license you intended to use, but you should probably make those three aforementioned places consistently refer to either GPL v2 or v3 (or later).