Issues with High-DPI unter Linux (Arch)

Hello fellow mcreator-fans!

I am using MCreator under Arch with a high resolution screen. MCreator starts and is shown too small.

I read in the 2021-02 release notes, that a automatic High-DPI support was built in - how does that kick in?

I also tried to start with the "-Dsun.java2d.uiScale=2" parameter, but also same result.

Any help is welcome :-)

thanks

Gregor