The "license" that comes with the program does not allow this to be done and requires that you own Clother in order to use the free items. Not only that. The EULA of Clother does not only want to tell you that you can only use the textures if you own Clother, which would be safe and sane in my opinion. No, they also want you to use these particular textures, even if you own the program, just in that particular program called clother. Moreover, they even want to restrict your ability to just look at the textures in a different program even if you own Clother (look at them. Not, by all means, editing them or anything else that could be done with a texture in a non-proprietary file format in a picture editing program). Which is in my opinion a little strange.