The 'instructions' for how to Upgrade from one DNN4 version to another were not in the zip file.
I don't have direct access to the server, so I couldn't just unzip the file to upgrade from 4.7 to 4.8.2.
This worked.
IN CASE IT DOESN'T......good idea to back up your portal BEFORE you upgrade. *Not responsible for disasters!*
1. Download the Upgrade zip file version from DotNetNuke.com and save it somewhere you can find it. I have a 'downloads' directory where I routinely put things so I can find them.

2. Unzip the file in a folder on your computer. In this case, I created a folder called 'upgradednn482'. You will see a directory structure similar to what's on the server.

3. FTP all the files and folders to your portal root (overwriting the existing files/folders). There is no file in the zip named web.config, so your web.config won't be overwritten (otherwise you'd have to add all the connection strings and stuff again.....argh!)

4. Browse to your portal. The updates will occur and you will see this screen displayed if it was successful.
