Anime Boston

If I remember correctly, at the opening ceremonies for AB 2017, Hirokatsu Kihara stated (through translation) that the screening of My Neighbor Totoro was a special edition that had never been shown to the public and had only seen by the artists of Studio Ghibli. I didn't watch the screening due to other events, but I wanted to know if anyone else had seen it, and can tell me what was different (eg. extended scenes, remastered art, different music, etc.)

Thanks in advance