I have noticed some bugs in 4.0.3.
1.) while I can copy and create custom 3D print settings, after a couple of days (or closing and reopening Luban) , I can then no longer edit the custom settings. I need to delete the saved settings and create a new custom file. I can create new files, so I can print, but its frustrating.
2.) If I manually create supports then save the project, the supports are not saved.
3.) Sometimes the object in the workspace goes red for no apparent reason. To resolve the problem I have to reduce the size then increase the size again once the object is no longer red. After the object is back to the original size I can then generate g-code.
4.) Intermittantly, Luban will not send g-code to the printer via wifi until I close Luban and reopen the software, which can mean I need to re add supports if I manually created them (see above).