Backup-Restore: All Device Units same Value of 1

[robatbentley]

After backing-up my Domoticz, rebuilding my Win10 OS (problem with disk), and then restoring backup, my devices all have the same unit number of 1. The devices no longer communicate with Domotics (no surprise there) but I'd like to know how I can change the unit numbers to be unique again without having to rebuild the devices from scratch. Any suggestions? Let me know if more info is required.