How to restore a Backup? No Restore Function for me

At the moment I’m suddenly facing some very strange problems with all of my Fibaro Roller Shutter 2s. Overnight they stopped reacting to Homey. I’m troubleshooting in the German part of this forum.

At the same time I would just like to restore a backup. If I flip the Homey around, start setup.athom.com and reconnect to WiFi, there is no option to restore a backup. Only “Keep your data” or “Reset to factory settings”. Nothing like use Backup etc.

In my account I see 7 recent backups.

In the guide I’m missing the most relevant step(s).

What am I doing wrong? Or is it just a Homey bug?

How can I restore a backup?