I think I have an answer for you regarding the Limewire log.
To delete the entries:
1. click on any entry; click the delete key.
2. to rid yourself of many entries, first click on an entry, (it should be highlighed), next, hold down the control key and click on the next entry. You should now have two entries highlighted. Continue this until all your unwanted log entries are highlighted, then click the delete key.
This is what worked for me. Good luck.