Update coming! Brave testers needed!

[Patrik]

Size has changed, but position too.
And collider box size not = object size.

Alright, I've figured out the issue.
The helicopter can be fixed by resaving it in the model editor, but a fix will be added to the next version so it's not needed.

For your light switches, it's a combination of the unit scale and some matrix transforms in the dae files. Still debating how to fix it as the engine handles the matrix transforms properly now which it didn't before. That seems to be a good thing, but introduces these kinds of backwards compatibility issues.

For now, what you can do if you want to use these models right now, is to set the unit to 1 meter like I said before, and also search for the two lines beginning with <matrix sid="matrix"> and remove them. Remember to delete the msh file afterwards.