0.0.2-3 incoming to extras-devel with a fix of the fix. Thanks for the feedback! Another push on the reset button is needed. Note that you will get the yellow banner error the first time you sync after a reset if you don't restart the app, but should be fine after that.

As for your question, there aren't any configuration files, the settings are in a sqlite database (i'm unsure of the exact location, it's determined by Qt itself). But there aren't really any settings to tweak anyway.