Mass importing to Blender or another way to make the .dff work?

To explain.

I've converted a map, but when I load any files into KDFF and attach the relative .TXD file it gives me the Make Error 2 when I try and create the collision file.

I've discovered that if I load the .dff into Blender and then hit export, the files then work with the KDFF and I can export a collision file successfully.

Is there a way to essentially do a mass/bulk import and export or is there another method of doing this?

Thanks for any assistance.