I have turned somersaults trying to update my AMPLIFi 150 using various PCs and versions of Windows. I am an experienced software developer, and I also know my way around a PC. The AMPLIFi USB driver appears not to install properly. Line 6 really needs to address this problem. When I suggest this on the support ticket, I get, “I can assure you that the driver works†as a response. Sorry, Line 6, you are dreaming. FIX IT.
In the end I updated the AMPLIFi using my iPhone via Bluetooth, which Line 6 says is unlikely to work. Here again, the Line 6 instructions were misleading. The secret is to click, “Show previous versions†in the AMPLIFi app, which then shows not only previous versions but also the update you wish to install, along with a handy update button. You don’t need to set the amp up in update mode because the iPhone app does this for you. It took about an hour to update, so charge up your phone and disable the screen saver before you begin.