I have windows 7 64-bit and FMPA 10 and I get this error with SeedCodeCalendarSimplified.fp7

Open up script debugger before opening the calendar.

Then step through until you see it start doing a version check.
Edit that script and disable the version checking options or modify them to suite.

I have never used that version so couldn't be specific about script names etc That is just what I would do to resolve it.