Can you use .wdl if you purchase a version of A7? I'm currently revisiting an old project and ran into the same issue. I'm using 'free' edition and no matter what I try, the screen is blank.

Yes, all non-free versions support C-Script (wdl).

Thanks for clarifying. Sidenote, 3D Gamestudio's (Acknex's) shop is pretty bad from a user experience perspective. I can't use a personal email, and I have to currently wait for a code. I got one email saying to mail them a check, but then got a confirmation screen saying that my credit card would be charged. I didn't get my registration code. A little confused.