Appears either this last upgrade or the inability of their servers to handle the load is at the root cause. God help us as the Color Nook owners jump into the fray. Still working on my net-book and updates with new additions, but deleting the software after logging out and removing the book files and starting over presents mixed results. No luck even getting it to work on my brand new computer, 00000000 books. Had the problem months ago, and here we go again!!!