Hi, I"ve been meaning to add some video tutorials for this, and I will try to make a quick one for you over the weekend.
I have a lot on my plate right now so if I forget feel free to bump this thread to give me a reminder.
As for your specific problem, you need to load up a project for it to work. The load button looks like a computer folder and it's on the right side of the screen. Click it and then choose one of the level files that came with the program and it should load up a project for you.
Feel free to use this thread for any other questions that may arise and I will do my best to help you.
Thanks for your support :)
Donny