I've investigated a bit about this issue with windows 10 and I've discovered that for an unknown reason, since a few months (caused by a windows update???), the part of the game window which contain the
DMD isn't rendered anymore when it's oversized outside of the screen, this was the hacky method I used to hide/display the
DMD and it was working flawlessly until now.
The only fix I think of would be to set your monitors like this:
This way, the top part of the game's window which is oversized to hide the
DMD isn't displayed in the "void" but on the backglass monitor, and the
DMD should be rendered correctly by the mod.