Where can i get files from examples in help?

Hello,

i am trying to find example files, which should be located in installation folder under */tutorials/demos/

Specifically, i was trying to find Radioss file 19 - Wave propagation to check how to use Boundary elements.

I cant find neither these files neither the folder anywhere, although i installed the desktop help and solver help.

Please help where can i get these example files.

Thank you,

Ales