Activation Problem

I downloaded the free version to try a CAD program for some layout drawings with the intention of purchasing a program if I find this useful and relatively easy to learn.

I have attempted to activate the program and nothing happens. The program doesn't open, I don't get any confirmation E-Mails, nothing. I've shut down and rebooted and tried opening the program again only to get the activation window again. Tried activating again, nothing.

If this is the reliability if this product I don't know why anyone would EVER pay to use this.

Looking for help before going to Auto-cad and trying their product.