Unable to restore a backup

I have a backup named: xxxx.bak currently in my Temp directory.

This backup was made from SSMS V20.

I recently installed SSMS V21 and unable to restore this backup.

Steps to reproduce:

1. Open SSMS connected as "sa"
2.  Highlite "Database", right click to select "Restore Database"
3. The window opens, I choose "General" under "Select a page", no "databases" are listed.
4. I then switch to "device", again no "databases" are listed.
5. I then look under "Destination, there are several database listed there but not the one I wish to restore.

I'm not sure what step, if any, that I am missing.

Murray