oh .. advanced section of Options ..

System tab - Whether you want LW to be default for magnet & torrent files. And whether you want LW to start as you boot your computer.

Listening ports .. this will probably be random if set to UPnP. If you require port forwarding your router/modem then this will remain static to match the port forwarded on your connection device. LW requires a port for connecting & one for listening so you can share over the network. These are usually the same port number. The Default port for LW to connect is 6346.

Proxy only for proxy ip address connections.

Performance .. normally these can be left alone. However sometimes LW may eat up too many resources or similar issue & disabling one or two of these may help.

Filtering is in regards to blocking those users who are spammers etc. ie: each time you ban a user in search results, their ip address will be added to the list on this window.