1st & foremost, you must find your FrostWire preferences folder; How to find your FrostWire Preferences folder (that link is how to delete them but it also shows how to find them!) Then open this folder & you will find the gnutella.net file inside. Drag & drop it onto a notepad empty document to open it. Then make the changes. Save the file. You must only do this whilst the FrostWire program is CLOSED!!!