title: Switch to older version of Maven
body: <p>I am trying to build a project using Maven but I don't know Maven.<br>
  Anyway I had a problem and I found in a link to use an older version of Maven. So I did, since the instructions for the project were about 2.0.9 anyway.<br>
  But now I am not sure how to proceed. I see under my <code>user.home</code> directory a <code>.m2</code> folder with a repository directory.<br>
  Should I delete this or not?</p>