Yes, yes, yes!!! Excellent!

Have been suffering with mixed resource errors and especially with infinite redirect loops once I tried to change the site url to https in general settings.

This plugin works like charm in a few seconds!

And yes, I have read the full article here:
https://www.icontrolwp.com/2014/10/enabling-cloudflares-universal-flexible-ssl-wordpress-without-infinite-redirect-loops/
and I do understand the less than perfect situation with flexible ssl yet indeed a step forward!

Thank you very much!