@everyone wondering about the version: This is not the Pro version. This is the Standard version that you see here: http://www.officedepot.com/a/products/855714/Corel-Aftershot-3-Standard-Download-Version/
I am not sure if Corel themselves sell the Standard version anymore.
As for system requirements, sorry I didn’t update the tech details. This requires 64-bit versions of Win 7, 8/8.1, and 10.