Dear Sweethome3D-professionals

I'm very happy with that wonderful Program. Thanks to all who work on it!
Because I'm searching now a long Time to find a Solution and didn't find, I try to ask you. Maybe its simple to do when I get the right hint.

I used Sweethome3D for planing the furniture. Now we are planing some changes at the house himself. For that, I had to build it oncemore in Seewthome3D because the measurements were not exact enough. After I did that, I wanted to copy all the furniture from my first generated File to the new one. But it dosnt work. Is it not possilble and I have to generate and configure all the furnitures again?
I hope you can tell me a way to mae it simpler.

Thanks for your Interest to my question und for any hint you can give me!

Heinrich