Masterleaf released the R25n including update 4K.
For now its a Test version because many things have not been tested yet so use with caution.
To download the R25n go to the download page and select specifically the R25n version.

All in one mappack R25n should be compatable with:
4K add-on version 5.8 – R25n
Arcade mappack F14j

We advise to stay on the stable version R25i