Good morning,
We are having an issue with PDF-X 5.5.312.1 and ATE 6.5.1631.0. When attempting to use PDF-X, A-Shell causes a GPF and closes. It works fine in version: 6.5.1626.2. If you would like, you can connect to my VM where the problem is visible. Also, this problem does not appear to exist in Windows 7, but does in Windows 10 1709.
Thanks,
John Andreasen