I just started using this on Linux (1.4.0 Beta). It does the job, but GUI Interface has bugs in KDE on Debain. No tray icon and you have to have GUI app opened for this to work.
Are you planing/is there a way to run Cryptomator as a service, and just point it to a folder?
And one other thing, are you planing to add a way to use users own key for encryption?
Thanks for your efforts! Hope this project does not get abandoned like 99.9% cool FOSS projects do.