MathType and WordPress

Does anybody have any experience with adding the Wiris MathType for WordPress plugin and getting it configured - especially in a small WP multi-site?

I’ve followed the instructions MathType for WordPress - MathType - Documentation - WIRIS , but I don’t think the instructions are that up-to-date vis-a-vis their own plugin & how WP plugins.

I think I’m close, but it’s not recognizing.