For Rick Wakeman, I am not suprised This guy is so complex and good.A real genius.
Concerning your supposed two monitors issue, I also use twin monitors and have absolutely no problem. However (and not related to Scaler), my DAW freezes when i have Reaper and any browser open at the same time. Sot, this can be anything.
Try working with only one monitor at the time to confirm (or infirm) this supposition. Check what other processes or VST you use. Try to disable them all except Scaler, then enable them one by one and see whether it still crashes at some moment,