Update coming! Brave testers needed!

[Patrik]

For conditioner model:
<unit meter="0.025400" name="centimeter"></unit>

That's a weird one. Try changing it to:
<unit meter="1" name="meter"></unit>
remove its msh file and reload it in an editor.

As for the objects changing positions, that's a hard one for me to solve without seeing the files. It could be that the meshes are no longer properly attached to the bodies of the entities.