Hi Jonas! Happy New Year to you sir!
Well I finally got it to work. Two things -
First I had to delete the Policy associated with Dave_home. Then using your given command I was able to delete the address book entry- My issue was that I had a lower case "i" for Internet - that's why it wasn't found. 
But after I corrected that, it would'nt take the commit because the Policy for Dave_home was squaking that it didn't have an address for Dave.!
So, I got the Policy out first, commited that, then went into the address book as noted. With a captial "I" for internet.
Thank you so much!
Scott