Installed ff4 (earlier had ff3.6 and ff4beta) and when i launch ff4, error "Profile is inaccessible and cannot be loaded". I checked profiles folder, but there is nothing in that folder except "Crash reports". Now I Cannot use any version of FF as i tried reinstalling ff3.6 but to no avail. I have never touched the profiles folder. I can deal with a fresh reset of ff4 with a brand new profile but cannot launch even the profile folder! Help!