Well, good news and bad news.
The good news is that renaming "coh" as "coh.old" worked - I was able to get Paragon Chat to load.
The bad news is that, as others have reported, I can't get into the game. It shows me 127.0.0.1 as the server option, but clicking on it does nothing. Also, Titan will not run - it gives the error message that others have reported.
Is there any way to bypass the "-localhost" switch to launch the game? I believe Codewalker included it in 0.966 to fix a problem, but it may have created another problem...