Is there still an underlying problem with your computer? (with crashing and needing to restore backups, etc.)
If there are problems with Windows or your hardware, there’s no guarantee an specific program like KeePass, Firefox, Kee, etc. will work correctly.
Also check out the troubleshooting guide since that contains a number of common problems to look for.
You’re importing into KeePass rather than Kee Vault I guess? It can be done in any case; I’ve never heard of any problems or reasons that you would not be able to import but if you can’t get it to work in KeePass, it’s best to ask about that on their support forum rather than here.