First check in Windows how the displays are assigned: right click desktop -> screen resolution -> Identify.
Windows associates display1 with the HDMI device, so your HDTV should be assigned as 1.
Second: In MC go to: Tools -> Options -> Tree & View. Under "Full Screen" select the display that Windows associated with your HDTV (most likely display1)
resolution: desktop settings (make sure you have the native resolution selected in windows for your display) or manually input it in MC.
Thanks guys ... I'll take a look when I get home and let you know ...
Regarding #1, I don't know how a Windows display definition would have changed after uninstalling and re-installing MC ... but I'll check ...
Regarding #2, ... this is what I'm looking for. It used to be in previous MC versions that I could right-click the display window and associate it there with 'display#1' or 'display#2'. It appears JR has changed how & where that association is defined.
It may be a moot point, as my new HTPC has arrived today, but I figured I'd run into the same problem with setting it up. Stay tuned & thanx again!!
EDIT: 'In MC go to: Tools -> Options -> Tree & View ...' was the preference option I was looking for ... Thanks!!
)