New Hisense TV, update Plex?

Server Version#: 1.22.3.4523 (Docker image)
Player Version#: 3.13.14 (Plex fo VIDAA)

just bought a new Hisense U8QF, everything updated to the latest versions.

There seems to be a much more recent Plex for VIDAA (5.15.1) version but I have no idea how to get this update. - Plex for VIDAA (Hisense televisions) - #12 by markus101

I’m not in Europe or USA - could this be the issue?

Any help appreciated.

I want to know this as well. I’m so disappointed that I am stuck on 3.13.14, even though it is still being developed and updated as we speak!