Oh that is funsville.
You can have D/S3 but NOT two editions of D/S4.
If you have D/S4.0 and want to update ... first turn off the CMS, uninstall that, then uninstall D/S4.0.
Then install D/S4.5
Then go to our complete order history and reset all those items.
Download them, install them.
Oh yes, before installing 4.5, rename the content folder because it’ll remove it otherwise.
The concept is that the Genesis of 4.0 is not the Genesis of 4.5.
So after installing 4.5
one has to find the installer for the content that came with it and run that.
Then everything else.