[MDDSD]

After debugging your HBOLauncher code with ILSpy, I think I know what is the issue:

My screen 0 is actually the secondary display, and screen 1 is the primary display. Since the config value is not considered if the screen parameter = 0, I have no way of setting the correct display.

See the Screen.AllScreens output

Thanks for finding the issue.
I've made a new version of HboLauncher.exe, replace the old one with the new.
The new version will look for the HboLauncher.exe.config file and it the file is found will automatically set the display from the config file no matter what.
By default this file will be renamed (in coming versions) so that it's not causing any problems for users not wanting it on a second display.

Please try the new version and let me know.

http://www.dsd.se/hbonordic/HboLauncher.exe