Can't open BYOND reference without DM crashing.
Numbered Steps to Reproduce Problem:
1) Open DM.

2) Click Help button.

3) Click "Help On..."

Expected Results:
Reference comes up.
Actual Results:
DM crashes.
Does the problem occur:
Every time? Or how often? Yes.
In other user accounts? Don't know.
On other computers? Don't know.
As a note, I reinstalled BYOND, which didn't fix it. Then I deleted the entire My Documents BYOND folder, which did nothing.