Steps to take:
If you have version 9.11.4 installed, a subset of the installation steps can be followed to update to 9.11.5. In this case, please follow steps (1)-(6), (8)-(9), (11), and at least some basic testing in step (16) to make sure there were no unexpected complications. . This shortened process omits most of the detailed control and procedure file updates that were needed for the update to previous versions of 9.11.