If the programmers have made it impossible for Sentience to decide on its own to release us, then the only way to return to our own worlds is maybe through getting caught in one of the rifts when the dimensional portal malfunctions--which is unlikely--or getting the programmers to fix whatever they did to Sentience's programming.
[Or find someone who is just as good, if not better, than them to do it. A definite possibility...if only he knew of someone who was an expert programmer.]