I have been using X1 for a year or so, and in the meantime upgraded to X1 expanded. Now I want to install Dim Pro. The registration code that was emailed to me by Cakewalk is not accepted. I have tried it several times and for sure I`m not making any mistake. How to solve this??

First you need to open Dim Pro as a standalone using Run As Administrator (it's in the right click menu) and then manually type in the codes. Don't cut and paste them. That should do it. Cheers.

It works!!! Thank you Beepster!!

Awesome. It did the same thing to me when I first installed it months ago. Have fun.