Used to use the java client but it's no longer available to I downloaded the NXT client.

I have a 4k monitor, but when runescape is set to 4k the text and interfaces are way to small for me to see. Whenever I try to choose another resolution, I can click on it but it doesn't change. I tried changing my screen resolution to 1920 and it changes to that when I run the auto-setup, but as soon as I change back to 4k it also switches back to 4k.

Edit: This is what my screen looks like and it's pretty much unplayable. I couldn't even snip my whole screen because snip tool would crash.