# Move your FOLDER to Dropbox
$ cd /Users/dylanmcleod/Library/Application\ Support/
$ mv FOLDERNAME ~/Dropbox/Shared\ Application\ Data/
# Then symlink your FOLDER back locally
$ ln -s ~/Dropbox/Shared\ Application\ Data/FOLDERNAME
# Remove the "outdated" directories
$ cd /Users/dylanmcleod/Library/Application\ Support/
$ rm -rf FOLDERNAME/
# Then symlink your FOLDER back locally
$ ln -s ~/Dropbox/Shared\ Application\ Data/FOLDERNAME