I installed a coda plug-in and want to uninstall it, but am not sure how to do that?
In the Finder browse to the /Users/yourusername/Library/Application Support/Coda/Plug-ins folder and remove the .codaplugin files you want to uninstall. That's it.
Oh, and be sure to replace yourusername with your Mac account name, usually it's firstnamelastaname.