[a squared]

delete install script
check forums
turn on plug-ins
check for plug-in compatibility and/or updates
update plug-ins and/or disable incompatible versions
check forums
re-open forums

enjoy

TheBlackPoet, it's really very easy although nerve racking the first time. I like to dis-able the forum and run repair/optimize database until it's clean, usually twice. Then make my back-up copy of it. I then create a second database on my server (the just in case measure). Then I run the update. Knock on wood I haven't had a problem yet. I understand your apprehension though. I took a look at your forum. It looks like you have a few hacks and plug-ins running there. Plus a custom skin. My advice it to do all of your homework first and make sure that everything that you have running now has been updated to 3.6.4 Then get all of that ready for your update.