Where’s the Pro version?

See https://matlipe.com/contact/ which loads fine for me.

For pro or commercial product support please contact the author directly on their site. That includes pre-sales questions.

As the author is aware, commercial products are not supported in these forums. As you are their potential customer I am sure they will have no problem supporting you there.

I tried several days but it was offline. Site is online now.

I have also tried to ask a question from his site. There is no contact form or email. Hopefully, my question will be answered here.