Performances NOT included in Backup

Dear everybody,

I've been enjoying my Kemper already for 2 years now, but last week I found out that there is something going wrong with my backups.
After creating a backup and opening the backup file using 7-Zip, I should find all my performances in the "Performances" folder.
But I only find 7 performances in the "Performance" folder that I used to have on my Kemper quite a while ago, but which are no longer installed on my Kemper. The 23 profiles which are installed on my Kemper are not in Performance folder.

Can anyone advise me how I can manage to backup all my performances?
Thanks in advance!

@hjscheffler:
Thanks for your tip!
Putting the backup in Rig Manager helped indeed: all performances showed up now!
I thought I lost all my performances & settings of the past, but they aren't!

@warlus1:
Thanks for your correction, I used the wrong term in my initial text!

Conclusion: problem solved, case closed!

Thanks for the clarification Burkhard. Now I know how-to and I understand why!