HELLO, I HAVE MADE THE PROJECT I HAVE BEFORE WITH THE LATEST OF 5 VERSIONS. BUT IT GIVES AN FAULT WHEN OPENING THE PROJECT AND TRANSFER BETWEEN FLOORS. ATTACHED PROJECT, IF YOU CORRECT THE ERROR AND SEND IT AGAIN, I WOULD LOVE IT.
Can you try turning off the 3D drawing mode in the Settings/General Settings dialog? (uncheck) I would also suggest you to update your graphics card to the latest drivers...