Hello,
With me Cura 4.2.1 is hanging too, but i found a work arround.
Problem:
After Cura 4.2.1 startup, i see it is loading plugins, but then at "Loading preferences" it's stucked.
Work arround:
Start a 2nd instantiation of Cura 4.2.1, this one does not stuck at loading preferences.
Info:
I'm running on Windows 10 Pro.
My custimizations after installation: Select printer Creatlity CR10S-Pro, add two filaments profiles and make thickness changes in the 0.2mm profile.
Before installation, I completely removed all previous Cura versions and all profiles to make 100% sure that old profiles are not causing this issues. This is my third and most thorough installation of Cura 4.2.1, i have no other options left that using the work arround of starting a 2nd instantiation. Hopefully the developers can reproduce this and use this work arround as a hint.
Best regards,
Gertjan