Keep in mind, this is an add-on. He's not the developer to the chat itself. So unless he subscribes to VBDev's MGC thread, he won't know. Also during the 1.x to 2.x transition, VB 3.7 to 3.8 and 4.0alpha are around. Takes time to update. And sometimes DEV's hold off cuz a new release is just about out which could make the change fail..
If you had to fix DB issues, it wasn't from the chat or this. They generally never are, unless you start running queries, OR you don't uninstall stuff like the readme says. Which is HIGHLY the case with the chat.
If you think this thread is contradictory, goto the chat thread. 250+ pages. Hehe.
And honestly, I would, but I get nothing outta it. I know how to install/troubleshoot it. I do all the support for the actual chat. I've installed it on about 200 forums. I got nothing. No donations. And it's not my product.
There's going to be another chat version out 2.2.1 just came out. There are too many variables. And I hade coding to begin with.
Not to mention, I work about 15+ hours a day on servers. So when I get free time....LOL...
My advice though....
Bottom line:
1. It's your fault for not doing a database backup prior to doing any changes. If it's not common practice for you, make it so. If you didn't know to do that.. Now ya do. Takes a few seconds to do a full db backup. Lose 30 days of posts due to a bad plugin or template edit or whatever, and you won't argue #1 ever. I wrote a script that does this automatically every 3 days.
2. If you have errors, give as much detail as you can. Sometimes if you are using FireFox, open up error console. That might show.
If you want, hit me up on AIM/Yahoo or PM me a s/n and I'll try to help you. What would take you a long time, takes me minutes to do.