In SkinGen there seems to be several missing textures, even though I just reinstalled the addon. 

For example, for "Suntan Bikini" under "Blemish/4_Suntan/Realistic Human Skin" it fails to load these textures:
Suntan_Barefoot_Leg_RG.jpg
Suntan_Bikini_Arm_RG.jpg
Suntan_Bikini_head_RG.jpg

It looks like the files should have been in the folder "Reallusion Content\Reallusion Templates\Others\Skin Textures\SkinGen\4_Range\Suntan", with the other suntan textures. If I copy and rename other files to match the missing textures in that folder it will not give the error, it will correctly load those files. I can not find the files in another folder.

This is an issue with several SkinGen templates, not just this one.