I posted this here a couple of days ago, but now think I might have more luck here. Any help at all is greatly appreciated.
I have been searching but unable to find a way to export my contact certificates in Evolution 3.10.4. I made a backup of my Evolution state on my current machine (File->Backup Evolution Data), and then copied it and restored it on my new one (File->Restore Evolution Data). This seems to have worked for everything (accounts, address book, etc.) except certificates. Is there something I am missing? Are certificates something that is separate from Evolution and handled with some other utility when migrating machines?