I now tested every single furniture since the problem occured, and i think i found the bad one. it works fine now and saves my updates again! Thank you for the quick help!!!!

Hey guys,
i just started using this application today, and i already love it! So thanks to the people who engineered it, its fantastic :)

However, throughout the work i saved my project from time to time. But after a few savings it did not save my "updates" anymore. I also tried to save it under ...