Don't know how to change a file in a mod? Just ask how to do that! People have done that before, and have got answers before. Fear of messing things up? That's what backups are for. Copying the zip file to another location before messing around with it shouldn't be that hard. Heck, just unpack it and edit the unpacked version! It will be preferred to the zipped version on loading, so if you mess up you can still delete the folder, unpack the archive again, and start over.
I'm not familiar with steam, so the following may not apply: I've all of the mods that still haven't been updated to 0.18 in my 0.18 mods folder. They aren't active, but if an update is released, I will be notified. Meanwhile, I've unpacked these mods and made the changes necessary to run them in the folder version (in most cases, just a change to info.json was needed).
Anyway, perhaps I've read something into your post that you didn't mean -- in this case I apologize. But it seemed like you were demanding something you were entitled to ("the full update promised"), although a solution to the problem was already presented to you on a silver platter. Sure, it's easier to just hit the upgrade-button, but if somebody makes an effort to help, the least thing the other party could do is to try to follow the instructions and get it to work by themselves.
