Does Mate have an official place to change the default directory applications will use?
The directories are Music, Pictures, Videos. I put them all under Media.
I looked in Mate's Control Center and scanned gsettings and didn't see anything.
for s in $(gsettings list-schemas); do gsettings list-recursively "$s"; done | less
However, when I grepped $HOME/.config I found a file user-dirs.dirs that contained them. I think I answered my own question . Just change the file names in this file and manually move the files. Cool.