Lost a window, need some help here.

So I'm using Nikon Scan 4, somewhat obscure program for a film scanner. Anyway, the window I actually need to do the scanning itself is off screen. It shows up in Expose, but it will NOT come to front. When I go to the Window menu up top, the only two options available are bring to front and Actual Size, and they're greyed out. I tried uninstalling, reinstalling and updating the software, and nothing has fixed this. Anyone got any other ideas? Maybe a third party app to force it to center? Thanks in advance.

I have no idea if this would work, but did you try command-tab? Hold down command and tap tab to cycle through the open windows.

Try using AppZapper to get rid of it, then reinstall. It should get rid of the window positioning settings.

Try removing the app's .plist file in your preferences folder.