Update on the other big problem, with the published .pak files not including any data from my modified .txts in Data\Public\MODULE\
After several hours fiddling with folders, FromHolland and I (mainly just FromHolland) managed to solve the issue. Holland was, I'm sure, doing all sorts of clever stuff modifying my files and straightening out whatever mess I'd made of them. The solution which fixed the issue?
Delete and resinstall D:OS and the Divinity Editor!
I was able to publish to Steam and install the module through Workshop on the other PC and the .txts showed up in game. Sweet. One problem down, two more to go!
A hundred thank yous to FromHolland for being so gracious and helpful. If you're ever in Stockholm, let me know and I'll buy you a beer.
