I use a program called Automobile, found at
LinkeSOFT AutoMobile Mileage and Cost Tracking
It uses different databases which I see in Activesync to keep track of different cars. One database (car) dissappeard from the application, but still appears in Activesync. The developer doesn't know how to fix, and I don't either. I guess I could do total restore of machine, or from SPB backup, just backup all the databases, but I really don't want to.