I appreciate the quality of product.
Unfortunately I found 2 problems:

1- Howuku Optimize is incompatible with Duda hosting platform (I had to discover this by myself)
2 - While trying to understand the various problems I was getting, contacted support 2 times.
They are gentle and very professional, but You have to be patient and wait 48 hours for a reply.

At the 3rd time, I gave up and had to refund, due to this compatibility problems.
:-(