The firm that made the Cool-er went into liquidation. So they are cheap and Argo outlet have them brand new for around £60, with 12 months guaratee.
With the old firmware you may have a very small problem, with some PDF files. This is because they do not close the PDF when turned off, so you best exit the PDF file (it keeps the page bookmarked, when opened again) and then turn off the cooler and it will bo OK.
the problem was solved with a firmware update. The best and last firmware is version 1.12.9 and you can see a demo of how to find it and laod it on YouTube.