There is no other indication that I'm in that mode, other than I can't type and the _ cursor. I have used VIM a long time ago, and I remember typing "ESC" then :q to quit. But I can't seem to do that either. I moved the Vintage package to an ignored_packages folder, restarted sublime, and still no luck.
Another strange thing: if i open a new file, i can type, but if I try to type in any of the files which were already open in my project, it doesn't work. I'm wondering if this is a bug? I'm using the latest 2100 release on OS X.