Ann,
There is likely to still be a folder in your My Documents > Adobe Captivate Cached Projects folder for each of the projects you had open at the time Captivate crashed.
Take a look at the information in this link:
http://www.infosemantics.com.au/adobe-captivate-troubleshooting/recove r-corrupt-project
Look for the headings partway down about how to recover projects from the project cache. In theory, the last two projects you were working on should be the ones with the most recent Date Modified dates. If you are lucky, you may be able to recover them this way. Fingers crossed...