SSL Let's Encrypt to Comodo SSL upgrade

Hi,

How can I upgrade an installed WP + LE SSL setup to Comodo Positive SSL?

You will need to apply the Comodo SSL manually, following their instructions. EE auto SSL setup is based on Lets Encrypt SSL.

Indeed, @ggloveswp

But how can I disable LE cert?

Use this command in order to disable LE certificate:

ee site update yourwebsitehere.com --letsencrypt=off