Had terrible problems with applications autostarting at login that I didn't want. I looked everywhere in /etc and /home/me/.config, but OpenOffice and Thunar just kept appearing.
Then I figured it out. One lousy time I checked the
Save session for future logins option on logout. So it restarted that way every time.
So the fix was to shut down all applications, logout (saving the session), log back in. Voila! All fixed.