Desktop download not Working

[Tut]

Actually, the Guides are completely up to date for the desktop edition. See these:

https://www.manager.io/guides/how-to/add-a-new-business-desktop-edition
https://www.manager.io/guides/best-practices/data-backup-restoration-and-transfer

You might also read the release note for version 17.4.0, although several improvements have already been made since it was published:

[17.4.0] Phasing out "Application Data" folder in desktop edition

In the latest version (17.4.0), Manager will no longer use “Application Data” folder to store its data. What it means is that your *.manager files can be anywhere whether it’s your desktop, my documents folder or dropbox/onedrive folder. If you are using desktop edition, you should probably have your *.manager file(s) in Dropbox, OneDrive or Google Drive anyway to have automatic backups. To accommodate for this change, the interface is slightly different. Instead of Add Business and Remove Bus…