Hmmm - Hadnt seen that one before. But its not your install. I duplicated it with the latest version on xp 32bit.
The program abruptly closes and the microsoft "Family Tree Maker has encountered a problem... do you want to send an error report ..." dialog pops up
Relaunching FTM gives the FTM was not closed properly, please compact... message. The change was saved however.
Time to send in another bug report.