If you overwrite the _userscm.dat, _userxrf.dat, _usergui.dat, _userint.dat, and _userdev.dat files, you must run the JADE Database utility (jdbutil) to reset the timestamp on these files.

If you do not do so, the database reports an error on start up. (For details, "Resetting Timestamps", in Chapter 3 of the JADE Database Administration Guide.)