I have the GoG version. Just to confirm that Silverback is correct. It reports as 1.56. I still see the bugs with Milk demand, ports etc.. I know GoG has been known to do updates that will help a game run with current generation PCs, I don't have a PC that was difficult to run the original disc version, so I have no experience whether there has been some improvements in that regard or not. I'm not a programmer. I don't know this hex stuff. I do have a simplistic free hex program. I tried a compare, but it doesn't give me a report on the % difference. The files appear to be similar length but there are at least a couple larger blocks that are showing as different as well as quite a scattering of shorter edits throughout much of the file. But as I said, I really have no idea. . . .