Travis Pew

I have this same issue on Mac OS Big Sur (App Store version). When I open multiple Sweethome 3d Files at once, if I close either one of them, then Sweethome 3d locks up and I must force quit it. If I only had one file open, however, I can close it, open a new file, close it, open a new file, etc. As soon as more than one file is open, if any of them are closed, Sweethome 3d locks up. It is very consistent. There is no memory issue, and I also tried increasing the memory Sweethome 3d is allowed to...