I still think if you figure out how to connect the device to the pc in rockbox mode, all your problems will go away.
Far as I can tell from the docs (and my fumble-fingered testing
) if you attach a powered USB connection to a switched-off Rockboxed Clip+, it starts up in its native (Sandisk) firmware and the preferred connection type (MSC seems to be what the Rockbox guys suggest and means it presents as a drive rather than a media player). Alternatively, you switch it on while holding <left> before connecting it -- which also has it running the native firmware.
However... all my problems with slow database updates are currently academic. Using my shiny new gadget in the car yesterday (connected to an FM transmitter that the car stereo is tuned to) I forgot to disconnect the wires when I got out of the car in the supermarket carpark. The audio cable got shut in the car door, the Clip unclipped and hit the ground and although I picked it up (with a few carefully chosen Words that would have even shocked any passing service personnel) I didn't discover until this morning that the 32Gb SD card is no longer in the device.
Like I'm going to find something the size of my fingernail in a carpark.
Although I'm going to take a long lunchbreak today...)
I suppose I should amuse myself with the idea that someone will notice and retrieve it, stick it in their phone and be so unimpressed with my choice of music that it gets handed in as lost property.