i had the same problem with samples from loopmaster.
what i found out is that the files themselves are marked as ‘read only’, so, if you look them up in their folder (in Windows/OS) and change the attribute, you should be able to edit them.
I just checked and the files are read and write. I have no idea how to identify which one’s are bass or which are kicks. In Traktor each one just says the title which is studio essentials. So frustrating.