Apologies, I would have done that first were it simple to do so. Thanks for the info. It would appear the problem is somewhere on my end.

This should be simple. Download it. It either works or it doesn't.

Running on Yosemite 10.10.5. Have tried downloading the Demo file twice a couple of weeks apart. Both open with a "verifying" message then "Deep Dreamer is damaged and can't be opened. You should move it to the trash."