title: Unable to pull from bitbucket or github repository using sourcetree
body: <p>I've suddenly started having problems pulling from and pushing to any remote repositories using SourceTree on my laptop. 4 hours ago I had no problem accessing my repository and pulled the latest code into my local repository. I then went to work and tried to push to the same repository with the same credentials to BitBucket and received this error:</p>
  <blockquote>
  <p>FATAL ERROR: Network error: Software caused connection abort</p>
  <p>fatal: Could not read from remote repository.</p>
  <p>Please make sure you have the correct access rights and the repository exists.</p>
  </blockquote>
  <p>I then tried from git bash and got a similar error. So I regenerated my SSH key and added it to BitBucket. Now I have command line access to the repo. I did the same thing using Putty for my SourceTree key and added that to BitBucket but I still get access denied.</p>
  <p>I could use the command line to push and pull but I'd rather use SourceTree. Particularly given that it was working fine this morning. Is there anything else I can try to get this working again? I've restarted SourceTree and rebooted since adding the new key but still no joy</p>