Just got me a "Fresh" copy of the Mitchel zip files,

and as you can see in the snapshot all files,

included in the texture folder:

So you need to do this:

Download both Mitchel zips from you account...zip 1 and zip 2,

Exract both content of the  zips in a new folder,

Grab the runtime extracted in the new folder and merge it/place it, to your main poser runtime...

Now you will have them all working perfect next time you will load Mitchel character to your scene.

Thank you:)

Joanna