It seems that you are having some issues with your Slingbox PRO-HD since it is no longer able to get the digital channels.
First, the last update has nothing to do with your Slingbox PRO-HD current issue. If for some reason you are no longer able to get the digital channels, I encourage you to run a scan channels process one more time in order to retrieve all the available channels.
Keep in mind that some channels might not be available since they might be encrypted and the Slingbox PRO-HD is not able to decode them. If this is your case, check this link.