ImagineTime has only one file that needs to be backed up: TBData.mdb. The rest of the files can be recreated by reinstalling the program.
The TBdata.mdb file can be backed up using your existing backup software, or it can be copied to a CD, USB drive, or other media by going to the Setup/Utilities Tab>General Utilities>General Utilities Tab>Backup Data File. It doesn't make any difference where you save the TBData.mde file as long as you know where it is if you have to restore the file. Each time the data file is saved it gets a timestamp. You don't have to worry about overwriting earlier backups. Note: You are responsible for making the backup copy - ImagineTime will not remind you.
If you need additional assistance, then please create a support ticket so that we can contact you directly.