Hello! Maybe one of these tips I have can help you.
To move/delete/copy multiple files at once, there are two methods:
1) Holding the "CTRL" button, while you left-click files, will allow you to target/highlight individual files/folders. This will allow you to bounce around the folder in any order you choose targeting files.
2) If there is a large section of files listed above/below one another, you can target them all at once with a a few clicks. First, target/highlight the file at the top (or bottom) of the "stack" with a single left-click. Then, while holding the "SHIFT" key, left-click the file at the opposite end. This should target/highlight ever file between the first and second click.
Please reply with any questions or let us know if this solved your problem. Good luck!
PS - If there is a particular artist you want to remove, you can sort the music by artist, and target every song by him/her using Tip #2.
Edited by Fusionbomb, 10 February 2015 - 12:22 PM.