I've been trying to update my installed usbflash install of Knoppix 7.4.2 to 7.6 using the iso. I managed to do this going from 7.4 to 7.4.2, but the notes I have for the procedure don't work now. Using the flash install tab either gives me a message saying "already mounted", or, if I direct it to another usbflash install than the one loaded, simply reinstalls the version that's running on the unmounted flash card.

I also tried the command line procedure, but this pops up a list of command arguments for flash-knoppix which, when used, produce a "command not found" error.

The md5sum for the iso matches the published one. I don't recall the update process being this difficult a year ago.