Hi David,
Glad you got that SSL all worked out.
I wish we could have debugged what originally caused the issue (was it updating our plugin, updating WordPress or WooCommerce, etc), but otherwise I’m glad it’s working OK for you now!
When you deactivate and reactivate the plugin(s), they will run their initial install / config script again checking that everything is set up correctly, so this is a good first option to try any time something is breaking from an update.