title: How to use the older version of ruby 1.9.2
body: <p>I have been using rvm and when I installed ruby 1.9.2, it installed ruby-1.9.2-p290 and a few days back I wasn't able to reference the older one but it asked to install ruby-1.9.2-p318.</p>
  
  <p>Is it mandatory to move to the newer version or would it be possible for us to instruct rvm to use the gemset created with the older version.</p>