Thanks for the comment!
I know I had some issues with drag and drop files in the past - But I'll have another look to see if I can figure it out.
Regarding the palette material, I don't know why I hadn't thought of this already.
Using one palette texture for all models will certainly be a good idea, so I'll add it near the top of my to-do list.
For now, I would recommend you use the material export, and import your meshes with 'Location: Use External Materials' in the materials tab.
Thanks again for letting me know!