FlexPro crashes

After installing FlexPro 6 SP5 I can no longer open databases by double clicking on the FPD file from Explorer. The database opens but crashes as soon as I click on anything in the screen. The database was written using SP4 and opening from Explorer was never a problem before.
The error is:

FlexPro.EXE caused a EXCEPTION_ACCESS_VIOLATION in module MFC42.DLL at 001B:73DD45BF, Ordinal3138

I can still open the database by opening FlexPro and than select the file from the ‘File’ ‘Open Database’ option.
Is there a solution to this problem?