The color settings in the tutor macro cause problems.
Tutor macro sets white text on blue background.
However, on Windows version of Vedit, most people probably use black text on white background.
This has the effect that syntax highlight look horrible, since the highlighted words have white background.
Block highlight is not visible, since in black-on-white color scheme, highlighted block has white text on blue background.
I suggest that in tutor macro, either fetch the colors from current configuration values, or just do not set the colors at all.
I simply removed the line
on line 145 of T-SUBS.VDM.