GUI slows down the longer it runs on Windows 10
The longer I run REDasm on my Windows 10 machine the less responsive the application becomes. Granted, I'm on a low-end laptop but the application slows progressively the longer I have it running; causing frequent restarts to get it back to a responsive state. I'm processing a 2 megabyte XBE file, if that matters.
Below is a screenshot of my Task Manager after running REDasm for 2 hours. I usually restart after 10 minutes, but this shows how heavy the CPU usage becomes. At that point the UI only responded to one mouseover-preview of a subroutine and was frozen after that. Pressing the X-exit button responded after 5-10 seconds of waiting.

Thanks for reporting!
It may be related to the renderer, I've noticed that it repaints too much. I'm planning to fix it in the next version which is in development