I found an issue where if you choose for Minion to not automatically scan for games for a certain game it won't load the AddOn database for that game.
So you'll want to delete your minion.xml
rm ~/.minion/minion.xml
Then restart Minion and when prompted make sure the games you want are selected like this:
Now it will try and scan for the game and it probably wont find it and prompt you to manually add one. However this time you should get stuff under search, etc. We are working on a real fix for this, so this is just a work around for now.