I have purchased Slingplayer App for windows store on my 8.1 Laptop, i loged ii and selected a Sling box from the Directory and was able view the Live TV.
However i am not able to return to the Directory and select another SlingBox, the only option i had is to view LiveStream, or Gallary or Guide, no option to choose Directory and Slingboxes..
Please advise if there is a way to return to the directry and chose other Slingbox, please don't suggest to uninstall and re-install the app and chose different slingbox
You will need to open the settings panel by swiping your figure from right to left to open the Charm panel. This Windows 8 FAQ should answer more of your questions:
Hope this helps,