It is still possible to use LW 5. And even LW 4. .
(Windows or Mac users of LW 4 or 5 should use the Gnutella Forum's LimeWire-FiX
program to connect to the network.)
1. Download 5.5.10.
2. Download fresh Gnutella.net file so you can connect
3. Install LW 5.
4. Open LW 5 & do the set up. Though since you already used LW before you probably won't need to. Then close the program.
5. Make sure LW 5 is closed. Then replace the Gnutella.net file.
LW installer for Windows is here: LimeWire Installers from versions 4 to 5.5.10
See Birdy's post about how to replace the Gnutella.net
file in the preferences folder. If LW 5 Will Not Connect