Prototype Files not compatible between JIM versions

Mel shared this problem 6 days ago

There are currently running both versions of JIM [8.7.8 and 9.1.0] on my computer.

I cannot open either prototype-file in the other version. Could you please ensure forward- and backwards-compatibility?

I now created a new prototype in version 9 as it would not allow me to take my prior 8.7.8 one with me, but the exporting functionality is not available and every day the new version is crushing unexpectatly...

Having put all the work in I still cannot go back using the old JIM-version