Thanks for updating the thread.
To be on the safer side, I suggest you to setup a staging server and copy the website files over there and then update the website. In case any issue comes up, same can be looked at without affecting the live website. We have also released a update (X Theme 6.3.3 and Cornerstone 3.3.3) that comes with bunch of bug fixes.
@raghavannair Raghwan, please follow the steps mentioned in this reply and in case you face any issue, please create a new ticket to avoid any confusion and slow response time.