Hey, thanks for this tool!
However, I found an annoying bug. After setting fullscreen it is impossible to go back into windowed mode. Saving changes is just doing nothing - the option is reverted. this renders software completely unusable for me as in fullscreen it is impossible to capture anything on a single screen. Especially when this software has the highest z-axis priority, even above Task manager... Swapping between fullscreen / both borderless works, only windowed is bugged. Surprisingly this is persistent even after... deleting the folder? Are options saved in a separate path?