I work on a Win10 laptop that, when docked, is connected to two monitors: a 4k next to a 2k. When I'm working in Neck Diagrams, I have the Note and/or Fretboard Inspector flyout windows on the secondary screen. When I undock and move to single screen environment, the flyout windows "stay" on the secondary screen and can never be seen or used. Quitting and relaunching the program doesn't fix this. The only way I was able to fix this was to uninstall Neck Diagrams, delete the Roaming Profile directories, and Reinstall.
Steps to dupe:
1. Dock laptop, run Win10 in dual monitor mode.
2. Launch Neck Diagrams
3. Open the Note or Fretboard Inspector and drag the flyout window over to the secondary monitor.
4. Do stuff in the program.
5. Close the program and shutdown the computer.
6. Undock the laptop.
7. Run the laptop off of its own, single screen.
8. Run Neck Diagrams.
9. Open the Inspector window.
10. Try to find it.