Rhino 5 still saving as a ver6

Hi all,
I have a Rhino for Mac ver 5 installed and currently working on important projects in.
However i have also had the WIP6 installed which know keeps saving in ver 6 which then doesnt allow opening files (since it expired).
Now it seemes to save as ver6 but in my v5 which im working in…So therefor i cant open them again in my licensed 5.

Anyone who experienced the same and perhaps have a proper fix to it?