Step by step....

Before you inject the Morphs++, you should see an empty Morphs++ container under Morphforms in your figure's body parameters. If it's not there, Anniebel is right and you did not initialise your M4 figure after installing the Morphs++ product.

After you have injected Morphs++, the container should now be populated with the Morphs++ parameter dials, as in my screen shot (yes, that's V4.2, but it works the same way). If it's still empty, there is something going wrong with the Morphs++ injection, which I personally would try to sort out first, before injecting the character.

If the Morphs++ dials show up correctly, and work when you twiddle them, I would suspect the character package itself, and contact the vendor for help.

"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)