We don't install or set any specific compatibility settings for that file, and on my system, the 640x480 is NOT checked ( as normal ), and I also can't change it.
No idea why it can't be changed, but clearly being locked to 640x480 is not right, even if the doesn't even have a screen, so it shouldn't even matter.
In any case, sometimes Windows set wrong compatibility flags by itself, so try checking these two registry keys:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
And if you see aline referencing it ( we haven't set it, that's for sure ), remove it from both keys AND REBOOT.