Tools Debug LotusScript menu option not available

I’m trying to debug a code problem on a user’s machine. I have Notes 8.5.1 + Domino Designer 8.5.1 on my machine and I can see the Debug LotusScript command under the Tools menu. He has only Notes 8.5.1. installed, and that menu command is not visible. How do I get it to display on his machine?

Subject: Go to View → Advanced Menus The option will not show if this is not enabled