[gil80]

I would highly advice you to just scan your content on a new installation.

What do you mean by scan my content?

The addons did transfer, but they seem to be incompatible with the version of kodi, not a fault of the restore function, so I assume.
The reason I'm asking for an in-place upgrade is based on the FAQ of the Backup addon:

I've re-installed a newer version of Kodi from scratch and tried to restore my data from an older version. Why isn't it working?
It is working, just not how you are expecting. When re-installing Kodi it is usually easier to install the version you had and do an in-place upgrade by installing the newer version of the top. Kodi will take care of upgrading your content, addons, and databases itself after running it for the first time. By doing a backup of your current, wiping your data, and installing a newer version you're not allowing these processes to take place. What ends up happening is that your old databases and other files get restored, Kodi just doesn't care to use them anymore. In the case of addons this could really mess things up by restoring now non-working addons from an older version of Kodi.
If you want to get your databases back after doing this there is something you can do. Kodi will perform a check on startup for the most current database version. If one is not found it will look for an older one and upgrade it. So you can do your restore process, then quit Kodi. Find the database files under userdata/Databases and delete the ones with the highest DB number. Then start Kodi again. It should take your old database and upgrade it to the most current version - creating a new database file in the process. Please note this only works for the SQLite database.