Ok. I’m not sure what I did wrong, but I now have already moved everything out of Boxcryptor to Cryptomator. Is it possible to simply move the vault to a directory instead of a drive letter? If so, how?
Yes this is possible. You can change the way how your virtual filesystem is integrated any time.
To do it:
Go to app settings and make sure that you have selected “FUSE” (red frames)
open your vault settings (vault must be locked), and change the mount point to your folder where you want to have the unencrypted files to be shown. This folder must exist and has to be empty. (yellow frames)
More Info see documentation: Setup — Cryptomator 1.6.0 documentation
Please note that the android app work different than the desktop app.
You do not mount the vault, the vault is accessed via the android app. No integration in document provider on android so far, but its on the roadmap.