I have not received a new registration number after updating the program

You don’t need to obtain a different registration number after updating Handy Backup to a newer version or purchasing a plugin. During the update, our database automatically renews the information about your product number, so you can continue using it in a new version of the program.

See also: FAQ | Plug-in Order, License Update:

Is it necessary to recreate and re-execute all backup tasks after installing a new version?

How to update to the latest version and save all tasks and settings?

I have paid for an additional plug-in for my Handy Backup, but the program still gives an error

Who uses Handy Backup?