ok, i fixed my issue by going to:
Right Click on the fireworks.exe file and the go to compatibility
I changed mine to Windows 2000 and it started working again. Hope this helps someone.
STILL AN ISSUE. I thought it was fixed using the steps above and although that seemed to work briefly, today it is back to its old ways. Does anyone have experience with how to fix this issue? Right now, all I can do is open the text editor and modify from there.
A friend of mine had the exact same problem. I think that what she did was disable the extensions one by one until it was back to normal!!
Hope this helps!