Nothing to add to fpp post - here I've done the same end everything works.
Remove ALL packages GPE-related (i.e. a long list of libgpe_something and other libs - don't remember the whole list) and then re-install by using the single-click install that also automatically adds the cobb's repository.
No data loss - I backupped /home/user/.gpe/* for the sake of safety, but it hadn't been needed.
HTH