Is there a way to recover what i was working on just before the program crashed, like you can in ACAD????????????

There could be the Newver file - see:http://www.cadforum.cz/cadforum_en/qaID.asp?tip=5945

and there are the backup files in the OldVersion folders - see:
http://www.cadforum.cz/cadforum_en/qaID.asp?tip=5996

Thanks for a very good tip for the future...I had already reopened Inventor with a different file so the Newver file that i needed was gone.  I also looked for that file version in "Old Version" folder but it was not there either.
 
Thanks for your help.