if there is no -3.5 folder, this means the "firefox" folder is the old 3.5 folder.
try to backup everything and rename the 3.0-XXX ones ... until you find the one you wanted.
if there is no -3.5 folder, this means the "firefox" folder is the old 3.5 folder.
try to backup everything and rename the 3.0-XXX ones ... until you find the one you wanted.