How do I disable an Outlook 2013 add-in without starting Outlook?

All the guides I've found online start with "go to the Tools menu". My problem is that Outlook 2013 will not start at all because it gets stuck at start-up while it tries to load the TeamViewer add-in.

How can I disable the TeamViewer add-in?

you can change the TeamViewer settings to disable the TeamViewer's Outlook addin. Go to options, advance, then disable outlook addin near the bottom of the list.

Start outlook in safe mode: outlook.exe /safe

If you are having problems with a Microsoft Office program, you may be able to use User-Initiated Safe mode to make it possible to run the program.

More info on Office's SafeMode here