I have been testing importing several different animations using multiple characters and the downloaded FBX file does not import into UE4 4.25 or 4.26 correctly. The character either does not import at all or the movement tragectory is only along the Z axis. In addition, the material texture does not get applied correctly often missing textures. I suggest offering the ability to download FBX files in various versions. This would solve several problems for all users new and old alike.