If you go to the ebook reader page on aluratek:
http://aluratek.com/products/ebook-readers
Clicking on "Firmware upgrade" delivers the 0.19d firmware. But I am hanging onto my 0.18g waiting for braver souls to try this. I found the last time I upgraded the firmware, my PC ADE program had to reauthorize my Libre. I don't know if others have had the same experience, but this makes me stingy on upgrading until I know there is something to be gained by it. Thanks