title: RStudio knit button is not showing options
body: <p>I have run into issues with my Knit button in RStudio.</p>
  
  <p><a href="https://i.stack.imgur.com/vXdyr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vXdyr.png" alt="enter image description here"></a></p>
  
  <p>It is missing all the options of Knit to HTML, Knit to PDF etc.</p>
  
  <p>I used to have these options. Even after restarting my Mac a few times, I don't have them.</p>