I'd like to suggest an archive to store the action scripts that are no longer used but not delete them for future use or just to keep the script. Also, If a person makes a backup of their files it is kept and could be restored at a later time.
My actions list is getting too long with used and unused actions.
You could right now do something user-maintained.
MP3tag only reads the folder data\actions but not any subfolders.
So you could move your unused actions there and restore them by simply moving to the original folder.
The saved configuration file also does not contain the subfolder - perhaps this could be a change in the zip configuration.