It appears as though, in beta 3.9 RC a much older issue has cropped up again. It is choking on imports. While trying to import a complex .step file (exported from Fusion 360) it begins to import, and then hangs for perpetuity. The model(s) were created at (near) the same time and in the exact same way as a similar model, which imported quickly-and-properly. It is hit or miss. It is even occasionally hanging when creating a model in Shapr3D, exporting it in the .shapr format, and trying to reimport it into another model/workspace. Please advise…