Here's the latest version of the Toolkit. It mostly consist of small additions/fixes. I had to revamp the Collada exporter/importer but I think it's for the best in the long run.
-Fixed Assimp.dll error
-Exported Collada (.dae) files should be smaller and more optimized. Less duplicate vertices
-Added mouse sensitivity settings
-Added animation support
-Added polygons with diffuse lighting
Things I still need to finish/fix
-Billboards don't always face the camera
-Finish TM1 compatibility. Some TM1 levels aren't rendered completely
-Photoshop (PSD) file support for textures
Twisted Toolkit x64
https://drive.google.com/open?id=0B0o4uR2ahBj2aml3a0VXOEpJSlETwisted Toolkit x86
https://drive.google.com/open?id=0B0o4uR2ahBj2dDlUeVUwTmRqRTAI haven't had much time to test it so I'm leaving the previous version in my signature in case you have trouble running this one.
* Apparently the bug where you can't replace a texture more than once is back. I think I fixed it.