I have been having trouble with Cura Hanging on startup. I sent in a ticked and was given several steps to got through to solve the problem
basically you go in and delete all the saved profiles with their step by step instructions. Than reload cura . so If you use a 3rd party filament you can not go in and set it up
so you know which filament, color, temp, manufacture, and so on. you are using you have to use the onboard generic profiles.