It was a little difficult in that it had no name or location (unlike other quarantined files that tell you their original location). But the time stamp matched exactly when FTM crashed and went missing. And just 15 minutes after that time stamp was the time stamp on the FTM2011 .exe file -- but that at least had its name and location.
It also helps in that I only had a total of 4 files in quarantine, and the other two were from months ago. So I had only one choice really.
It was a leap of faith to restore the file. But it worked.