To get this skin safely, it is best to use official or well-known community channels: Official VirtualDJ Site : Registered Pro users can often find legacy skins like Mix Lab 3.1 VirtualDJ Extensions Installation Path Download the unzip it). Move the file to the Documents > VirtualDJ > Skins Activation Open VirtualDJ. Settings > Interface Mix Lab 3.1 from the list to apply it. Important Notes
While built for older versions, XML updates allow it to run on VirtualDJ 8 with most main functions intact. Virtual Dj Mix Lab 3.1 Skin Download