Do I have to increment patches from whatever updated 2.0.86 to the next level and up bit by bit?
I have found that patching needs to be done with EVERY patch that was released, the exception being the initial jump if you downloaded the razor game.
Google the patches, download, install in order. I had to patch base up to 1.9 then WA up to 2.4, then do the 1.10 and 2.5. If I tried it in any other order, it gave me the invalid file error, or "patching could not complete". Maybe it'll work if you do everything up till 1.5, then base-wa-base-wa-base-wa up to the end. I know it doesn't like having one more unpatched than the other. I don't have HELS so I can't help there.