As for support forget about that there is none or at minimum VERY VERY VERY little of it. Had problems many others have had and there was no answer to those questions asked for the same problem over and over.
For being an extension that is still being updated they can at least provide better support. Especially, when there is such a large number of users for this extension.
Oh did I forget that there is bugs (not security issues that I seen just bugs) in this current version of the extension too. It gets old when you have to save the parameters then leave to another component and come back to jUpgrade just to get your parameters that you saved to work.
Just my 2 cents on this extension, maybe it will work for you. Maybe just maybe those that run their forums will actually start answering questions of the same problems.