If you connect to the system with the joystick and open the example I sent you in the Service Tool you should see a parameter (ID.Node.SeverAddr) with the address of your joystick (0x34). Change this to 0x33, click the write parameter icon or press F4 to write the new address to the joystick. Cycle the power to the joystick and it should have the new address. To see the change in the service tool you may need to press F8 to scan the system after cycling the power.
The parameter page in the example has two parameters set up. Both are for ID.Node.ServerAddr. The reason for having the two is just for ease of use when changing from one source address to another. One is for 0x33 (0,51) the other for 0x34 (0,52) Only one will show at a time depending on what the joystick address is set to. You may get a replace missing ECU message when opening the file, if so just click cancel.