Hi, I've recently managed to re-install version 102.15.1 on my laptops and desktop as I hated 115 with a passion. I'd also had microsoft making my life hell with their OAUTH and cookies shenanigans. I could only access my outlook/hotmail accounts by using outlook in a browser which I really hate and is why I started using Thunderbird years ago. Anyhoo, since I managed to install 102.15.1 again and sort out microsofts problem I've found that my address books have disappeared. I've seen answers to other peoples problems mentioning profiles etc. but that just baffles me. I just want my address books back, ( both collected and personal ) as it makes it so much easier when addressing emails to just type the first couple of letters and then choose from the results rather than having to ytype the complete address. So if any can help I'll really appreciate it, Thanks. Alf J alf.j.slawson@outlook.com