Ultimaker Cura 4.9.0

What's new in this version:

Digital factory integration:
- Now you can open files directly from Digital Library projects. Then, after preparation, quickly and easily export them back. This feature is available for all users with an Ultimaker Essentials, Professional, or Excellence subscription. Learn more

"Line type" is now the default color scheme:
- When entering the Preview mode, you don't have to switch manually to line type.

Z-seam is now clearly shown in preview mode:
- This ensures that you will know whether the seam will be sufficiently hidden in the end product. This will also indicate the starting point of the print.

Fixed:
- a security vulnerability on windows permitting the openssl library used to launch other programs
- Connect Top/Bottom Polygons
- closing Marketplace after quitting Cura
- clicking on Marketplace button to go to web Marketplace
- Pause at Height when using Repetier flavour
- correct density for current PETG filaments
- Pause at height post-processing script that returns to the right position
- layer view being grayed out after reslicing
- fan speed issue due to reuse of empty extruder plan
- loading OBJ files with no texture references, but does have normal references
- retraction/priming while extruder switches
- loading script from all registered resource paths
- typeError: define_round_method
- missing layer with Hole Horizontal Expansion
- Tree Support Floor layers
- Top Surface Skin Layers if Top layers = 0
- recent files on opening as project
- opening project file from command-line
- thumbnail in UFP files
- validator for floats in Machine Settings dialog. Contributed by @fieldOfView
- recessed areas at the bottom of a model while using Make Overhangs Printable
- slicing grouped models if one of the group parts is below Z=0
- material temperatures and fan speed for Anycubic i3 Mega
- drop model down to buildplate when always drop to buildplate is disabled.
- drop objects to buildplate after scaling
- disallowed areas while using Brim Line Widths
- message for non manifold models
- setting category arrows
- metadata tags for 3MF files
- engine crash when using low-density Cross Infill
- performance of loading .def.json files