Oh, you're a little think alright, Ricky...
I think Memilm means that running one of the Jim Sachs/Prolific SS' in windowed mode, the current (JS/P) SS will not kick in. The asking part is about whether or not it's possible to have the system understand that it shouldn't launch said SS if AR is running in a window.
OK, not so many monosyllables there, – but look! A whole bunch of TLAs
/Tiny Thinker