I am sorry that your programming is freezing while streaming to your SlingPlayer for iPad. Normally, if you had purchased the application before the current version and were not fond of the most recent update, you would be able to locate the previous version that is stored away in your iPad using this article:
In this case, considering you had just purchased the app as version 3.1 rather than updating to it, you won't be able to locate the older version because it isn't stored on your iPad.
Some other articles that may assist you with your poor quality of video are available on our support page as well. I will list them below for you:
I have a question for you, though: you stated that you encountered this issue while using the iPad alongside the AppleTV. Does this issue persist when streaming solely to the iPad?
Let us know!
The Sling Moderation Team