I installed a couple packages (including vim mode), and now Cmd-Shift-P opens what looks like Webkit inspector instead of the command palette. Also, the initial greeting where commands you can run are overlaid across the screen such as "You can jump to a method in the editor using Cmd-R" are over my editor. As a result, I can't do any editing or change the preferences.
Is there a way to uninstall packages or to blow away my installation and start over? I tried deleting the folder in Application Support and reinstalling, but that didn't solve the issue.