If anyone is still interested. I started a project on github to create a settings configuration that adds Dremel 3D45 support to the newest iteration of Cura (4.8).
Github Link
What's working so far:
Cura lists the Dremel3D45 as available (definition copied from Dremel Digilab Slicer)
The 3D model of the build platform is shown on build volume
Dremel materials can be selected from the material browser (PLA, ECO-ABS, Nylon, PETG)
The default material is set to the Dremel ECO-ABS when adding a new printer
Quality profiles for 0.05, 0.1, 0.2, 0.3 and 0.34 are now globaly available.
The temperatures are now taken from the material properties (default_material_print_temperature, material_bed_temperature)
What's missing:
No network support for printer (you have to use USB stick for starting prints)
The default_material_print_temperature in the 0.05 & 0.034 need to be specified for special materials