How to control big button sample ID mappings?

I am able to upload sample audio sounds to my Bastl microGranny. And I can create, backup, and restore preset “TXT” files. However, the preset files strangely do not include which audio sound is active. So when I switch presets I also have to manually reapply all six audio sounds.

Some kind of persistence is available for audio sound <-> big button mappings. Because when I power cycle the device, then the last selected sounds are present. How can I manage this mapping, so that I can rapidly swap out the big button sounds without constantly scrolling and reimaging the microSD card?!