Not sure what happened on your side but nothing changed on mine. The same SSL certificate has been in place for a few years now and it auto renews itself. I still see the lock icon in Edge, but Chrome has done away with the lock icon in the URL for awhile now.
I think awhile back (as in a year or more) I removed the code to force your browser to use the "
https " version if it was on the "http" version due to some issues that was causing...but again I'm thinking that was more than just a few months ago. I might look at bringing that back, or just put the time into finishing up a new version that is mobile friendly.