Our team is aware of the Rewind "Update Error!" bug. We have no updates in Rewind, and this is expected if you click on 'Check for Updates'.
The latest version is 1.5310.
On a related note, our focus is entirely on Limitless at the moment and we do not have any new versions coming anytime soon. For more details, check out this article: "What are the differences between Limitless and Rewind?".
