Full app settings backup guide.

[melle]

I noticed some apps like imich like to lock there databases with passwords.  These passwords get auto-generated by the installer. 
I would like a button that allows me to download all settings and config choices i made. like all the different custom script I added. And the password and biddings that got made for curated apps. 
Trueness has a sort of similar  button like this but it does not give me the app settings.

I would love to downloads such a file in 1 click before any major update.