I have the Memory Usage window open so I can monitor how much is used. If I open a Playlist that almost fills memory, then make a new empty playlist, the memory stays full. And if I then load another large play list I get memory full errors as songs load. If I quit the program and relaunch it, the memory clears and I can open the 2nd play list. But it seems like there should be a better way to purge the memory to load different playlists or workspaces. I don't want to have to relaunch every time I change shows.