Assuming you have acquired a legitimate (non-malicious) copy of Build 339 and the Print Offline Mod, here is the standard installation ritual:
The official offline mode can sometimes be limiting or still tied to server authentication. This mod allows players to enter the game world completely independently. This is ideal for users who want to explore the graphics engine, test new avatar builds, or simply enjoy the scenery without the pressure of social interaction or the need for a subscription validation check. 3DXChat Build 339 Print Offline Mod