Where are the certificates in Avast Free AV?

I’m trying to find these as the first step in sorting out problems with Thunderbird. The blurb on the site refers to older versions of Avast AV where components are listed separately. I’ve been through every option I can find in the latest version and haven’t found them yet. Any help appreciated

Found it in the old version option thanks to someone on here. I didn’t even know there was an old version option tucked away off display in Troubleshooting

https://forum.avast.com/index.php?topic=224906.0