This Sucks!

I cannot get my Limewire Pro, which I just purchased, to install! I I get this error during installation:
"An error occurred while downloading file http://www.installengine.com/isengine/isscript.msi
What would you like to do?"
And gives a retry or cancel option. Retrying brings no better result and so I re-downloaded a new copy- twice- same thing, and nowhere do I find a place to write to live tech support and get this resolved.
What a big rip off! I want my $9.50 back!!!!!