Well that allows you to change the font size, but it doesn't change the size of the interface elements, so it doesn't help much on a 4K screen.
Unfortunately there is no way to run the current version of Ultra Fractal on a High DPI screen while using the high resolution. I'm hard at work to fix this in version 6, which I hope will be ready for release at the end of 2016. In the mean time, you can use this workaround:
http://www.danantonielli.com/adobe-app-scaling-on-high-dpi-displays-fix/
Just follow these instructions, but apply them to Uf5.exe in C:\Program Files\Ultra Fractal 5. That will enable the regular resolution that UF expects so all interface elements will work as expected. However you won't be able to take full advantage of the high resolution provided by the 4K display.
Well that allows you to change the font size, but it doesn't change the size of the interface elements, so it doesn't help much on a 4K screen.
Unfortunately there is no way to run the current version of Ultra Fractal on a High DPI screen while using the high resolution. I'm hard at work to fix this in version 6, which I hope will be ready for release at the end of 2016. In the mean time, you can use this workaround:
http://www.danantonielli.com/adobe-app-scaling-on-high-dpi-displays-fix/
Just follow these instructions, but apply them to Uf5.exe in C:\Program Files\Ultra Fractal 5. That will enable the regular resolution that UF expects so all interface elements will work as expected. However you won't be able to take full advantage of the high resolution provided by the 4K display.