I have a similar issue, in that I want to reorganize where my files are stored. So far, I simply move the files (usually entire folders) to the new location outside of MB. I then restart MB in Administrative mode (don't know if that is necessary, but it works). The files reappear as they should. Using the Main Player, I have a Displayed Field called Path, and the files I moved are correctly located. I have another, related issue regarding Albums, for which I will create another post.