"Save to another name" may be a file name change only. UFT 2.0 permitted numbers, and perhaps hyphens in the project name. Around version 2.1-2.3 it was found that this confused Foxpro. Go ahead and change the project name to include letters only.
Backups can still include numbers.
As to upgrading, it would seem prudent for anyone who has not upgraded for archival purposes to purchase a copy of UFT 3.0 and download the 3.1 patch and back it up off the hard drive. Gonna do that real soon now. Backup that is. With the CD burner.