El Capitan: macbook pro encryption self started after update to iTunes on 12/11/16. After update restart computer opened to grey screen requesting if I wanted to use ICloud password or Log-on password. I don't want/need encryption do I?
After updating iTunes on 12/11/16 my computer restarted in "grey screen" and required a password for encryption. It then encrypted my MacBook Pro (10.11.2) Additionally, the iTunes update has "lost" my Playlists and 90% of my purchases. Apple Care Level 2 couldn't find them! They show up in my account but not in my iTunes.
1. Do I need the fully encrypted computer? If not how can I un-encrypt?
2. How can I get my old, fully organized iTunes back?
Thanks
MacBook Pro, OS X Yosemite (10.10.1)