http://www.naviter.com/install-the-l...are-for-oudie/
If you don't fancy using the updater tool
click on the link - Download latest firmware for Oudie 2
which will download a file called UpdateOudie.exe
copy this onto your Oudie flashdrive or SD card (doesn't matter which) and
start the oudie, which will show the update process and ask if you want to
continue updating from your current version to 5:19 click yes and that's
it.
The update process will complete and rename the .exe file to
UpdateOudie.old
Just updated my oudie this way today.
Cheers Matt