Lost data (.prt, .asm, and .drw) on a workspace after Creo Crash

Is there away to retrieve lost files from a workspace after Creo was restarted from a crash?

After crash the workspace is missing a large number of files (.prt, .asm, and .drw)

Files where new and have not been uploaded nor checked in

The cache for the workspace has not been cleared

The workspace is still accessible and working (not corrupt).

running Creo 7 version 7.0.5.0

windchill 12.0.2.0

Solid user of software however administrator skills on windchill are not so strong

Any help would be greatly apricated as it was a large amount data.

Thanks

Brant