Thanks. I found the same file
here (http://download.kobobooks.com/firmwares/kobo/kobo-upgrade-1.8.zip) by trying different URL's until something worked.
Contents of the .kobo/version from my reader:
00:08:54:E3:15:01,NickelEReaderKoboLinux,1.0,Nicke lEReaderKoboLinux,NickelEReaderKoboLinux
Do you know how this upgrade is applied?
It only contains the following 3 files:
fs.img
u-boot.bin-eb600em
uImage-eb600em
And doesn't look like any of the other upgrade version files.
I tried a number of different approaches, none of which worked.
- Copying the zip to the .kobo directory and restarting
- Extracting the files to .kobo directory and restarting
- Formatting an SD card as ext3 and copying the files there. Restarting with Menu/DPAD held down.
I also tried putting the kobo into Upgrade mode as described
here. When I plugged the kobo into my computer, I didn't see a partition I could copy files to. (I did see an error in Device Manager showing a device with missing drivers).
My guess is that the old version of Kobo Desktop knew how to write to this device when it was in upgrade mode.
I did try installing the version of Kobo Desktop that comes with the Kobo original. However, it kept upgrading itself to a current version, which doesn't support the original Kobo.