No more 4K support in the newest update

[Hugh-Gi-Oh]

After this week's RageMP update, 4K support has disappeared for borderless windows. Normal GTA V still works just fine, the issue is isolated to RageMP. This is what it looks like:

 

The white stuff is just a notepad to hide my desktop. The problem is that the RageMP window is very small, and the settings are still at 4K. Pressing alt+enter works, but then I can't use borderless windowed anymore, even if I press it again. Since I have to tab out very often this is very difficult for me, and if I tab out of fullscreen it sometimes glitches and I have to restart.

 

Please fix the lacking 4K support. Thanks.