title: How to undo uploading files in code collab code review?
body: <p>I started a code review from the command line using </p>
  
  <pre><code>ccollab adddiffs new D:\Development\review\before D:\Development\review\after
  </code></pre>
  
  <p>I made changes to the code and then went to upload those changes to the review using:</p>
  
  <pre><code>ccollab adddiffs ask D:\Development\WRONGpath\before D:\Development\WRONGpath\after
  </code></pre>
  
  <p>code collab errored out saying there were no files to upload.  Okay, fine.  I fixed the path and redid the command with the correct path</p>
  
  <pre><code>ccollab adddiffs ask D:\Development\review\before D:\Development\review\after
  </code></pre>
  
  <p>I properly edited the list of files in the text file leaving all the original file names in there except files I did not want added to the review, but Code collab proceeded to add the files as new rather than as diffs to the original files.  I'm wondering how I can undo the last upload to the review?</p>