Location of all Retroarch Files

So my version of retroarch is really messed up from overwriting files and screwing up permissions. I get a failed to load content on every core (including a freshly installed 1.0.0.1. However, deleting all the files through Cydia or manually doesn’t seem to fix the issue. When I re-install the issue persists. Whats more, once deleted, I noticed there are still retroarch files floating around.

So my question is where are all the remnants of Retroarch installed so I can manually delete them with iFile and get a clean build installed from scratch?