About a week ago there was a BIOS update for my XPS 15 (it also applied to other systems). The documentation for it was a mess. It was indicated as either version 15, 16, 17, or 18 depending on which line you read. The .exe was "XPS_9550_1.2.18.exe". That no longer appears in the list of updates. Has this been withdrawn? I have not yet applied it. Should I hold off?