I saw where someone said they had to revert to C2 version 192 to successfully export to PC/Steam with NW 10.5. Is that true and, if so, how would one get their game saved with the latest C2 to work with version 192? Is that possible?
Once a project is saved in a newer version of C2, you can't roll it back to an old version. Simply impossible.
You could recreate it identically but that's too much time.
I've been using NW 0.12.1 (or 12.1) and it's working fine for me.
If you want to use NW 10.5 I'm fairly use R0j0hound made a thread of it. Basically you just replace the files in the exporter with the older files, should work fine.