Ajag,
Not sure why you think this company does TeamViewer. Not to my knowledge.

I see you registered on the forum 5 years ago. Have you used BIAB before?

When you said:
"annoying message saying you exceeded your limit"
Did you register the software?

There should not be any significant difference between downloaded & hard drive versions, except for installation process and I believe HD version allows you to run RealTracks/Real Drums from external hard drive as an option.

Having said that, I would check three things in this order:
1) Did you register Band in a Box?
2) Did you configure your audio hardware correctly?
3) If you open any Demo song, does it play OK?