I haven't been able to make FMP5.5 working.
Install goes, but I'm not asked for the serial number.
Tried to go Xover Configuration, choose Repair/Delete FMP5.5, on next screen I choose to repair : I'm been asked for the serial number then for Internet Registration.
Anyway, FMP5.5 can't be launched, I'm told (translation from French) "This software has been bad installed or modified by another software.Once problem identified, re-launch installation".
I'd be happy to have some feedback about this version on Xover
I give up for now ...