There should be a trial version of FM11 available for this purpose. You have to convert from .fp5 to .fp7 first, then from .fp7 to .fmp12
(check the downloads on this website)
As Markus Schneider posted, first, you use FileMaker 11 to convert to .fp7 format, then you use Filemaker 12 to convert to .fmp12 format.
Here's a download link for a 30 day free trial copy of Filemaker 11 you can use for the first step of the conversion:
I also recommend that you read these two Knowledge Base articles on converting your files:
Converting to .fp7 format: http://help.filemaker.com/app/answers/detail/a_id/750/kw/converting
Converting to .fmp12 format: http://help.filemaker.com/app/answers/detail/a_id/10571/kw/converting
Be prepared to invest some time into testing and updating the converted files as there is a good chance that your converted files may not function perfectly. The KB articles cover many, but not all of the possible issues. Feel free to post back here with any issues you encounter that don't seem to have been covered by the KB articles.
Markus and Phil: Thanks, just the prescription the patient needed!
Kind of confusing that they would use FMP 11 but as long as it works who cares right?
All versions of FIleMaker from FileMaker 7 to FileMaker 11 used exactly the same file format. There was no file conversion needed. Thus, you only have two file format conversions to make, the first into the .fp7 format, the second into .fmp12.