correction: none of my emulators are working now! they all have the same problem i reported with nestopia above. help!

i really like RomShelf. thank you! however, i have a problem trying to launch nestopia with v2 on Windows 10. nestopia launches in the background. i can hear it running the game but RomShelf is the only thing on screen. i tried using alt+tab to switch to it but RomShelf won't let go of the screen. my other emulators work fine so i'm inclined to blame the problem on nestopia or my nestopia settings. is there any kind of work-around for this problem? (besides using a different NES emulator?)