When "covers only" is selected---After downloading, GAZO will automatically launch.

Choose 1 album and open "Album settings".
Check if the selected bookcover is in Display 3. If it is, installation is complete.

When "with album" is selected---
After downloading, GAZO will automatically launch and will display the selected album.
However, because it is not directly installed in GAZO, the next time you use GAZO, you must either download it again or save it with a right click and "Save on file" when downloading.

Once the layout data has been downloaded, GAZO will automatically launch to complete installation.

Choose a free-layout(FFPP) album, and check if the layout data you've selected with a right click, "Page Layout", and "Select Layout" is there or not.

When you click on Download, GAZO will automatically launch.
Choose the name of the Bookshelf you wish to change, and click on "OK" to change to the selected Bookshelf data.
To change the design of the Bookshelf again, proceed from "Bookshelf settings".

You must launch GAZO beforehand.
When you click on Download, a new screen will display the image of the bookend.
Drag-n-drop the displayed image on an empty area of the Bookshelf.
The bookend will automatically change.
To change the bookend again, proceed from "Bookshelf settings".