Thanks for following up.
I am running Cornerstone 3.04 and X 5.25.
I went to the page you suggested for the latest version numbers which are displayed as
Pro 2.1.0, X 6.1.0, Cornerstone 3.1.0 -
I can't find where to download the latest version of X and am not sure if the two I've stated first above are compatible.
Can you further assist please?