[UPDATE, July 26, 2012: Found the solution:

1. Connect the Logitech Harmonyh remote control via USB cable to a PC running Windows.
2. Open a web browser and go to myharmony.com.
3. Register or sign in and download the LogitecHarmonySoftware.exe if not already done so.
4. Run the software. It will offer a browser window where you can change the settings of the remote control.
5. Navigate to "Buttons".
6. Scroll the image of the remote control so that the button you want to change the settings of is visible.
7. From the list of commands, identify the command you want to assign to a particular button.
8. Drag the command (in our case "White") to the  preferred button (in our case "- +").
9. Ét voilà! ]

A week or so ago we lost the remote control of our Topfield TF500 PVRt terrestrial receiver. Maybe our toddler handed it in with the garbage collection. Who knows.

We bought a Logitech Harmony 300 universal remote control. After synchronizing its software via Logitech’s myharmony.com website, the device seemed to work like a charm.

Until we tried to delete recorded TV programs, that is. Navigating the menu works fine, until you get to the file list of recorded programs. The on-screen instruction for deleting files shows a white button.

While the original Topfield remote control (left image) features a white button in the left-down corner, the Logitech Harmony 300 (right image) does not.

So, unless we’re overlooking a shortcut, our hard drive will be filling up with recorded programs in no time, rendering the recording feature useless.

Any clues? Anyone?