The problem with the JDrive is that it not available therefore it's impossible to specify the correct steps to install it. However, a more simpler way is to contact Jeunesse through Twitter. They're very active and I believe they will answer to your inquiry, but for that to happen, you need to create an account on Twitter.
Twitter page: https://twitter.com/JeunesseHQ
Once the account is read, visit their page and send them a DM or a twitter post.
