The Addons folder has been deprecated. We made this decision for a several reasons:
Removing a skin folder will also remove the addons avoiding unused addon folders.
Having the addon within a skin will avoid version conflicts. For example, two skins may require different versions of an addon to function properly.
New skins should NOT use #ADDONSPATH#. Rather, the skins should include addons directly within the skin folder folders (preferably in the new @Resources folder).
To accompany this change, we have removed support for installing addons to #ADDONSPATH# in the new .rmskin format.