[ddouglass]

If it was me I would upgrade that Ram to at least 4 GB. That would go a long way toward letting you use newer releases. I don't believe Hoster was ever designed for using multiple copies open at the same time. The version 4 releases were meant to bring all those functions into one location. You can play your audio through the BA (if you get that Ram upgraded) and setup Karaoke and videos through the main playlist. without having to switch back and forth between copies.
Just out of curiosity did you make all the required changes to Windows 7 before you tried 4.31?