CHANGE HISTORY:

Ver 1.36
This version can be used for DVR-440HX and DVR-540HX.
The update improves
- Losing DVB-T channel list in certain condition. 

Note:
Please make sure to reset your recorder to all its factory settings with the following procedure and then make again the basic settings with the Setup Navigator. 
* If you do not reset your recorder, fixes related to DVB-T channels will have no effect.

Procedure to reset your recorder:
1. Make sure that the recorder is on.
2. Using the front panel controls, press and hold "Stop" and press "STANDBY/ON"