Whenever PlexAmp is launched, it loads itself directly in the middle of my main screen. I can move it anywhere on my main screen, close it, and restart it only to have it place itself back in the middle of the screen. I can move PlexAmp to any other screen I have connected, quit and start PlexAmp and it places itself back in the middle of my main screen.
This was not the case on W7 x64.