[Material Editor Crash]

I've been having a problem with my material editor, where every time i go to open a box appears and says MaterialEditor.exe has stop working. Does any one know any reasons or possible solutions why this is happening?

[Adding my models to the editor]

Al your models should be put inside the models folder. Wheb the sandbox is loaded, the models automaticly appear in the editing menu.I don't know if there is a models map in the trial version.

 

That does work but for some reason they don't appear to be textured like other objects in the sandbox. does anyone know why?

[Adding my models to the editor]

HI i'm new and was wondering if anyone know how or where to put the files (gmf,phy,dds) of models in the leadwerks sandbox folder? or how to import them.