Brushes directories are messed up. Can I put them back to the default?

[Klawdek]

I think I have messed up my brushes.  I think some default brushes are missing and there may be some kind of corruption.  I also get an error when I try to refresh brushes.  I am using 2.8.14 on windows 8.1 I have pictures of the directories and the error message but this forum does not allow pictures to be posted.    

The error message is about not being able to write to some file.


Is there any way to put my brushes directories back to the default?