Flickering when Opening Project Editor

Starting today, when I open the Project Editor, I get a constant screen flickering that doesn’t stop as long as I have it open. When I close it, the flickering stops. I had the older version SDK (16 I suppose) and updated to the latest on the “SDK Updates” panel within MSFS (17) but that didn’t fix it.

Thanks for any help or guidance.

Edit: I don’t mean that the buildings, runways, etc flash - the entire screen flashes.

I figured out the problem. Maybe that’s not the correct way to say it - I figured out how to solve it. When the Project Editor screen was opening on a separate monitor, it caused the main monitor to flash. When I moved it so it would then open on the main monitor (the same as the one running MSFS) then it no longer flashed.