I do not know why there are so many problems with Krita. I have 4.1 installed and the preformed brushes many tags have been installed with. Some double and triple. And different without a brush. Is there a way to remove them without deleting the important brushes?

Hello,

the brush tagging system is very buggy right now and I would not bother to tag any brushes at the moment. Tags are duplicated autmatically or are removed. Sometimes they reappear after loading Krita. The bug is filed and we will have to wait for the fix.
Creating new brushes also is very problematic. They as well disappear randomly or their default values are lost then and now.

I know this is annoying, especially when you come from some other program and want to recreate your brush library.

Cheers,
Andreas