Weird thingy in object maker that WONT GO AWAY

[papayatoot]

Okay, so I recently downloaded a few more objects to put in one of my maps. One of those objects was a TARDIS mesh, with a little light on top. I loaded it, and along with it came this little yellow and transparent square. Once i deleted the mesh and loaded another one, the square was still there. I tried ignoring it, but it loads in next to any object I try to create! It's this rando annoying square and it will not go away to save its life. I tried moving an object away from it when I loaded it in object maker, but the little square still stuck to the object, thinking its part of it. What the toot is this thing and how to I get rid of it? It's ruining a bunch of objects! 

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http://prntscr.com/5p0ql2  <---LINK TO PIC

[Bawfle]

Looks like you're missing an important texture. Try re-doing everything you did to download it. Make sure the material, texture and mesh files go into Media\\Objects\\My Objects and the Object file (if there is one provided) goes into Media\\Objects.

[Thierry]

to be honest, when things like that happens i reinstall the game, and i add the meshes back carefully, trying to only add what i need and checking if some mesh its causing the problem