One One Software is offering a free download of the whole premium version if you sign up for their e-mail newsletter. The offer is good until 28 Jan. I checked. It is a real offer. I downloaded the Mac version flawlessly.

http://www.ononesoftware.com/landing/pe8offer/

Jan. 28, huh? Too bad I saw this post on Feb. 11.

Steve.

Offer still appears to be valid.

I downloaded it back in January, but have taken no new images to try it on. Maybe this weekend. We are supposed to have record high temps, near 67 here in Flagstaff on Friday. PE8 looks similar to the NIK filters