title: How to install multiple appium version on the same machine?
body: <p>For my daily work I've been using appium 1.4.16 and java_client 3.3.0</p>
  
  <p>I would like to start and to look into the new appium version (currently 1.5.1 / 3.4.1)
  Download the new jar and embed into my project it's not an issue, but I was wonder how do I download 2 different appium versions and how do I start the specific version I need  ?</p>
  
  <p>I've tried to use "appium-version-manager" , I've installed 1.4.16 / 1.5.0 / 1.5.1 but from some reason I couldn't launch appium ver 1.50 and above while 1.4.16 version was launched without any issues...</p>
  
  <p>Any advice would be appreciated</p>
  
  <p>Thanks</p>