title: Downgrade to previous version of Spyder
body: <p>I'm currently using the Anaconda package with Python 2.7.9-1</p>
  
  <p>Yesterday I upgraded the Spyder-app via the Anaconda Launcher and all of my scripts now crash. (Some bugs are already reported in the issues page <a href="https://github.com/spyder-ide/spyder/issues" rel="noreferrer">https://github.com/spyder-ide/spyder/issues</a>). 
  How can I downgrade to the previous Spyder version meanwhile those bugs are fixed?</p>