I just bought the package, and the skinned models aren't textured. You can see why if you inspect the FBX files (and why they work for the author but nobody else): the textures all point to absolute paths. For example, here's the redhead texture file in the fbx:
D:\VoxelAssets\FlyingBike\BikerWoman\CharacterExports\BikerWoman_Redhead02\Redhead02-0.png
...so these textures always fail to load, since they were saved with absolute paths instead of relative ones.
(edited to correct accuracy)