Cross DJ 2.1.0 File Access Restricted, Try Relocating Track

I updated to version 2.1.0 this week and now Cross DJ doesn't work at all!
Every time I try and load a song it comes up with the following error message " Track Loading Error. File Access Restricted, Try Relocating The Track First". It worked fine before the upgrade.
I'm running MAC OS X 10.8.2 and this happened before the iTunes update but even after the update it still doesn't work.
The only unusual thing about my iTunes library is that I have two that I toggle between, but all of my music is in the default library. This has never caused an issue in the past.
Every time I try and load a song it comes up with the following error message " Track Loading Error. File Access Restricted, Try Relocating The Track First". It worked fine before the upgrade.
I'm running MAC OS X 10.8.2 and this happened before the iTunes update but even after the update it still doesn't work.
The only unusual thing about my iTunes library is that I have two that I toggle between, but all of my music is in the default library. This has never caused an issue in the past.