4K screen (3840X2160) becomes more popular recently. However, a lot of softwares are not compatible to this high resolution display and have the interface issues. I installed FloMaster FE 8.1 on my laptop with 4K displays. When i launch it, the text size and icons are very large in the welcome setting page. In the main interface, the menu text is big but the menu bar is too small.
The workaround is to set the Compatibility settings highlighted in the image below. This workaround seems to work to other softwares.