Kerbal Space Program

I have my Windows computer (OS Windows 10) connect via HDMI cable to my 4K 55" LG TV. When set to 4096x2160 resolution, the UI is extremely small, and nearly impossible to read. Thus, it is necessary to increase the UI sizing via the General Settings ==> UI Scale slider. Preferably, the UI scale would be able to go beyond 200%, since at 200% it is still really small on the 4K screen. However, at the maximum of the UI scale slider (200%), the navball graphic glitches. Where the ship reticle should be, there is a hole instead. In fact, you can see the sky behind the navball through the hole. This makes it challenging to navigate. I discovered that this is not an issue at 190% UI scale, but as I said before, even at 200% it is still small enough that it makes it inconvenient.