Your comments

This is happening with me absolutely all the time with all my projects. The only way to get the sidebar to update is to restart ST2, which I have to do every time something in my project directory changes. I haven't tried to reinstall ST2 yet but it's next on my list.

I completely agree. I'm currently creating a Sublime Text color scheme wizard (which will create tmscheme files) on Google Appengine. I'll post the link here when it's usable