Okay, that's one step closer!

Did you run the V4.2 update script after installing the creature morphs? There is some more information about this script in the Read Me file.

Also, are the standard Morphs++ working okay?

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)