Pro and basic are functionally the same. Think of Pro as a donation.
Here's what I do for a clean install
use LW's uninstall, then get rid of the extras:
Finder->Find
Search in: Everywhere
File Name contains: "limew"
Visibility: All
I also trash the LW installer's invisible pref: search for "zerog" (cmd-opt-delete needed for this one)
Inspect any folders called "incomplete" (I trash all the old incompletes and the downloads.dat file to really start fresh).

-reboot in safe mode
-repair permissions
-reinstall java 1.4.1

Download a fresh copy, and if that doesn't work, then for further OSX troubleshooting help try here