Is there a way to make the ForeUI interface and all of its elements larger for proper display on a 4K screen? Changing the Display settings for the Main Editor to use Big Icons and the Main Category Display to use Big Element Buttons does help but everything else is nearly too small to read. Especially the text in the Elements Panel and the Tools Panel.
If you are using Windows, besides reducing the entire resolution, you can globally make the font size bigger:
If you are using Mac with Retina display, the OS has built-in scaling settings:
If you don’t want to change the system settings and only want ForeUI’s interface looks bigger, the only solution in my mind is to run ForeUI in virtual machine, which can automatically stretch the UI to fit the VM window.