Vdm Brush Importer
Do I need an object slected to make the add-on work?
Yes, because it needs to switch to sculpt mode to import all the brushes.
Does it remove all my objects in my scene?
No, the add-on makes a new scene to bake everything so all your objects are left untouched.
Do I need to delete all my generated Icons if I want to make new Icons?
Yes, if you want to generate new images you need to deleted the old ones.
It will also use a custom thumbnail that is named the same as the specific brush you want to change it's icon .
Why does it gives me error even if I don't change anything?
You can try deleting the whole baking scene or reopening blender and it should be alright after that.
Does it work on 4.0 onwards?
Yes!