Have one for NEW install and one for UPGRADE if this is so confusing for so many users I'd think that would maybe cut down on the amount of upgrade issues.
Please no....
I use a billing solution, and they have separate upgrades to the full package, which is only intended for new installs.
One of the biggest problems is having to upgrade each install in turn, and also think about any modifications that have been done.
Much easier to import the changes locally and then upload all files.
The only 'upgrade' version that might be an idea is one without the includes etc., so that critical files can not be overwritten.
