You have 3 choices: 1. you will receive an email response to all of your responses to your post. 2. Withn LW go to Help in the LW menu bar. Choose the 4th option for Forum. 3. Visit the LW website & go to support & you'll see to link to the Forum.
I'm not sure why your iTunes should have stopped. It might be an idea to reatart the computer if it's not a problem. The issue will probably disappear after that.
Ignore the Grey arrow. All that does is contact the music store. It doesn't mean anything to you!
Within OSX iTunes you can drag songs from one list to another. eg: from the Library to a specific playlist. I think you'll find all your LW downlds are also in your iTunes library!