I have purchased Band-in-a-Box Pro with RealBand 2020 and RealPAK Rock/Pop 16

When I open the RealPAK Rock/Pop 16 song demos there are many instruments missing.

What could have gone wrong? I have followed all the installation steps and rebuilt the styles. I have even uninstalled everything, delete BB folders, clean registry entries with CCleaner, and install everything again.