I updated to the paid version some 4 weeks ago and have had no problems that I relate to the transition. My Network Bridge runs the latest version of Mosaic and my Synology NAS runs the MinimServer 2.0x (latest version).
MinimServer can do some things that the earlier version did not.
You can folllow the development on https://forum.minimserver.com/index.php
Very fast and good support, too.
The only issue I have is related to the fact that Mosaic has problems remembering items (songs) in playlists containing NAS files. See the thread on this forum Mosaic Playlists