'refresh tor browser' makes it inoperable

On starting tor browser I got a dialog box asking me if I wanted to 'refresh tor browser', or something similar. Unfortunately, I quickly said yes without making a screenshot.

It seems to have removed all the plugins, including the one that starts tor underneath the browser. So I ended up with a broswer window without the noscript or tor button, and when I try to open anything I get an error because the proxy isn't there. (If I start a newly installed tor browser in parallel the old one will also access that tor instance as its proxy.)

Browser window looks like https://twitter.com/akrey/status/733563836691685376/photo/1

There is a similar refresh thing in stock firefox; I have no idea when and why it decides to aks whether you want that.