You ca find the sound files for the pirate version here:
XP --> C:\Documents and Settings\All Users\Application Data\Alwil Software\Avast5\sounds\1909
Vista (onwards) --> C:\ProgramData\Alwil Software\Avast5\sounds\1909
As for the settings in the troubleshooting section, the default settings should be ok as they are.
I am not sure whether I have tweaked those settings, but the 1st, 2nd, and 4th ones are checked for me.
Scott