I followed the instructions for the firewall you gave me, and got everything else sorted out. I tried using LW for a short while and all went well.I didn't get back to LW until this morning and now it opens, but before I can even start to use it - it shuts down.
I followed the instructions given in the posting below mine, took out the preference folder of LW and deleted it. I then did a disk permissions and software update, nothing. Did a restart and still nothing!! Strange that it actually worked for awhile before I changed the firewall according to your instructions.