How to open Panther files since Panther is now Cross Gems

Now when Panther is dead and Cross Gems is new one how I can continue my old Panther projects? Cross Gems is installed but Panther files dont work with that.
If I try to Sing In to Panther log in screen freezes and Rhino crashes.

How I can edit my Panther projects of how do I tranfer those Cross Gems?