Found a bug. When you enable CPU monitoring but select a pattern that has only one color (like some of the predefined 'color' ones), the application starts opening new, empty windows in a loop (probably on every poll event?) and the whole machine becomes unresponsive. Have to force-kill application or wait a few minutes until the 'application has stopped responding, do you want to close or debug it' dialog appears (maybe upon running out of window handles? That's what I figured I'd wait for...)
The fun thing is that after that when you restart the application with the blinkstick plugged in, it starts this behavior again automatically.
This is on Win10, blinkstick square, latest version of software (I got my blinkstick literally 15 minutes ago).