Silly question: are you putting your addons into the saved folder, or the addons folder?
The correct process is
- At the character select screen, click the Addons button
- New window, click the Open Addon Directory - game tabs out by itself
- Copy your unzipped addons to that folder
- [optional] close the folder
- Back in the game, click Refresh
If you did everything correctly, then you will see your addons in the list.