Hi John and welcome to cdfreaks,
First off, there’s no difference between the “quick-download trial version” and the retail version. They differ only in terms of how long they can be used, ie., trial=30 days, whereas with a paid license, it is the life of the product.
The downloadable programs are the same for everyone.
My program (platinum) is installed on my c: drive. This is the default location for installation, the same as most software programs. Back when Fab 3 was pre-retail and we were beta testing, I had various apps installed on 3 or 4 hdds. If I recall correctly, all of the installs defaulted to c:…so I had to manually choose other hdds.
You must’ve done the same with your d: hdd.
If you wish to keep the program installed on d:, you will probably have to manually choose this hdd with each new version. This will maintain your current settings. As long as you choose the same location each time for your install, you will not create multiple applications, ie., each version will install on top of the previous. This manual selection is avoided if it’s c: (the default location).
As far as archiving versions…simply choose a location, create a folder and download them there first and then run the installation. This way should you choose to revert to a previous version, etc., you’re all set.
Hope this helps.