I downloaded the file but I must be missing something. I extracted to the skin folder. I tried tools/choose skin, but no option there. I tried Tools / import skin, but it doesn't find filetype it is looking for.
The skin file is actually a ZIP file but you don't need to extract it by yourself. Just download the whole .fms file to any location (C:\Program Files\Abrosoft\FantaMorph3\Skin is recommended). Then, launch FantaMorph, choose the Tools/Import Skin File menu and then select the .fms file.