I just tried updating the software, both the IOS and the CUE for a UC520 router using the CCA 2.0.1. It formatted the flash, then failed to install the IOS or the CUE claiming I had a FTP or TFTP server running. This laptop has never had/ or run a FTP or TFTP server. Meanwhile, I end up with an empty flash!
Clearly there is some kind of bug/ error in the new software.
Meanwhile I have a useless router.