As for me... after updating to 2.0.0 and seeing the error, I successfully reverted to the previous version (by deleting the new version, restoring the 1.0 version that was placed in my trash, and syncing it onto my jailbroken iPad v1 in iOS 4.3.3.)
Now I can launch it and log in, but now I get this error instead: "The programming you have requested is only available when you are accessing this video service in your home, using a cable modem authorized by Time Warner Cable." (Which is frustrating to see, because of course I am using the same cable modem I've always been using, and this app has previously been working fine.)
I rebooted the cable modem and tried again, to no avail. I'm sure whatever "official" troubleshooting I try with TWC will just end up with them suggesting I update to the latest 2.0 version... which of course won't work, because I am jailbroken. And I don't want to give up the jailbreak, just for this app.
I am also forced to wonder right now, if the initial launch of the 2.0 version of this app on a jailbroken iPad somehow "reports" our IP address to Time Warner, which allows them to blacklist this iOS device's MAC address (or this cable modem,) until this account is logs in again properly, with the device in an unjailbroken state. Does that make sense? Could TWC be that vigilant and annoying here? If that's the case... folks... you really don't want to update/launch the 2.0 version.
I'll keep my fingers crossed and all, but it's difficult to be optimistic that jailbreak developers will be able to hack a workaround for this... seeing as it requires a TWC account with an authorized cable modem along with TV service to even be able to check out the app in the first place.
Ugh.