I just completed the upgrade from 12.1 to 14.0 and it went pretty quick and no errors reported... however the system is very slow to respond and it still shows "fvdw-sl firmware version 12-1" in the top-left but System Management -> Information shows "nwsp1 fvdw-sl 14.0"
When using the left menu options, I get "Current System Status: execution command, please wait..." with no page displayed. Only System Management and Firmware Update actually show me a page.
I am going to install the update again and report back. Thanks for the work you do in keeping these devices running well!