First of all: Thank you for testing!
Yes, every prefab is dependant on the mesh files and textures it uses. Currently you have to manually pack them together to distribute them. An option to automatically pack all dependencies into one archive could be an option for future development.
Btw: Please retest your path issues. I think I fixed it but was not able to test it.
The scaling is as follows: A cube with a length of 1m in Blender will have a length of 10 Units in Neo. That is 10 times as big 😀
The cancel button is fixed now.
Thanks for that screenshot :p
Where can I download this project?