Ok well, went through all the files looking for "custom_tooltip" and fixing up those references. Did not add in the new events that appear to have appeared in the latest patch, because I was unsure of the ramifications of them/whether they were thematically appropriate. In addition to the defines changes, the game does not spectacularly crash upon launch now. Most of the files in each folder I didn't really touch, but I couldn't remember exactly which files I had to change stuff in, so I just RARed the whole thing.
I haven't really run the game for more than a few years in game though, so I could have missed something.
View attachment 93281
EDIT: In case it's not completely obvious what to do with this, un-RAR and drag the contents into your mod/ElderKings folder and replace everything.