Minion utf8->base64's the path when it stores it in the minion.xml so that it can handle unicode paths. You can use this tool to decode it.
http://www.base64decode.org/
C:\Users\John\Documents\Elder Scrolls Online\live\AddOns is the path its writing to. Are you on NA or EU mega server?
If you look in there does it show the addon folders?
Do you have "allow out of date addons" enabled in ESO? Many Addons wont load because of the latest patch until you enable the loading of out of date addons. Most addons still work but because of the patch are marked as outdated by ESO.
I wonder is that your problem perigorn? Did you not select to load out of date addons in game after the patch?