This has been a problem for me for years even on different computers and upgrades. I just bought it from Microsoft and same problem. If the 3d view is touched at all, the program hangs and has to be closed through the Task Manager. When it opens, it opens with the 3d window separate and gray. I can ...

Zulu locks up, too. Sigh. I love this software but it just doesn't want to let me see what I am doing. Now running Windows 11. Same behavior.

Seriously. Over the span of 4 of years at least. I have even upgraded computers in that period and the behavior persists. I am currently running Sweet Home 3d 6.6, Java 8 Update 301, 64-bit. I had the same trouble running under 32-bit.

If you could guarantee that the issue would be resolved by ...

Running 6.3 and 6.4, once I open in a separate window, it locks everything up. Would love to be able to use my other monitor, too. I wonder if this is the key. I retired from my coding days years ago and never did Java. I am willing to give this a try if someone can point me in the right direction ...

It works fine as long as I don't open it in a separate window. At least I can finish my project. Thanks.

It seems to lock up after I open the view in a separate window.

Windows 10 Pro. 64-bit system. Used the download from the 3dh website. I just tried your test. It locks up, too. Thanks.

The program keeps locking up on me. I can open a project and maybe make a few changes or open the view in a different window before it locks up. I have to end Java from the task manager to get out at that point. I am running 6.4/8 261 and have the latest version of Java. I have a brand-new, well ...

A local install just stalls out after a few minutes even on a good gaming machine. It makes me crazy. I have used it for years and now am dead in the water.