*.jas file - problems with extracting

1st

Newbie
Nov 18, 2018
91
236
One of the Renpy VNs I tested has all its images stored in a single images.jas file.

Google says it should be opened by Photo Shop Pro. I tried, it failed. Then I've found something about some Cheetah3D software but this turned up to be a thing for Macs only, there is no equivalent software on PC. So I'm stuck now.

My question is: Is there any way to get it extracted on PC?