I installed Digital Editions(DE) v 1.5 on receipt of my Sony reader. Everything was OK. However today I ordered three books from Waterstones. When I clicked to download the books I was directed to the DE screen that advised me that an update was required. I clicked on this and was directed to the DE web page, which stated click on the "install badge below to download update. I cannot see any download badge on my screen. If I click on download on the right hand of the screen nothing happens. How do I get the required update?