I don't think I suggested anything about points 3 & 4. The Add/Remove>Repair doesn't work with LW 4.9
I don't understand your problem anyway. Does LW open or not? I've the impression now you only have a connection problem. Deleting prefs can sometimes fix this "if" it was working fine before.
Did you configure your firewall so it allows LW full access (advisable not to have 2 active firewalls b/c they can interfere with each other);
Firewall configuration instructions (click on link)
Can you give us a total desciption of your set up:
1. Do this simple test for us. Using your browser go here:
http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?
2. What firewalls you have?
3. How much ram?
4. Hard Disk space available?
5. Connection type? (eg: dialup, broadband, cable, etc.)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. Who is your isp provider (Internet Service Provider)?
9. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
10. Is this a your 1st try at LW or is this a new problem with an experienced user.