@Ondřej-Šutera
I have a proper version, which is v38.1.5. It works perfectly fine since it has the old UI. The new version is not "proper".
I understand, that you cannot assure, that old versions will work forever, since your API may change. This is totally fine and completely understandable. But actively suppressing older versions is like slapping your customers in the face.
I'm perfectly happy with paying for your services and using the older app with the better UI.
To be blunt, it feels a bit like a strong slap in the face: First, the UI is degraded in terms of user interaction of efficiency (see my and others users various reports in other posts). And now I am warned that soon the older version with be deactivated.
This can not be meant seriously.