RE: Click and install applications upgrade versions
You can resell any service as addon through hosting plan from Hosting Plans :: Add-Ons , and this service or addon could be part of your hosting plan.
In Hosting Controller next version, due in March - April 2009, you would able to upgrade to new version of any click and install apps. We'll give flexibility to our customers to run latest version of 3rd-party click and install apps with HC.
HC Support Team