I had instances of FH 11.02 crashing as well. I found out that it was happening
on older files that I was updating and revising over the years. What I did was
create a New document and then Copy/Paste in the old document. Also I
discovered that OpenType fonts were being used in those older FH docs. In this
case OT Myriad Pro, so I replaced with a standard version. No more crashes.

Hope this helps.