I am having the same problem, but only on the computers in the house.
I can access and use DishAnyWhere from my mobile phone.
On the home computers (which I have been using for several months without issue) the "WATCH" Tab is grayed out.
When I open Dishanywhere I get the "You could be watching your TV on this computer with a Sling Adapter. Would you like to learn more?"
When I close that window, on Slingplayer it says "Connected to Living Room 1. Please select a program to start streaming"
I've done the Hopper RESET, uninstalled Slingplayer and reinstalled.
The Hopper shows on the Dishanywhere screen (under Account and Devices) with a green dot, and I can RESET the Hopper from this screen, so Dishanywhere is talking to the Hopper.
Anyone else find a solution?
RodeoGeorge
EDIT:
Well, this morning it is working again.
The magical mystery of the digital world.