So after hearing from Plesk support that I need to upgrade my server to 10.3.1 to get the needed PHP fix so that Plesk properly identifies the version of PHP that is in use to install programs from the Application Vault (inparticular the latest version of WordPress)... I tried running the upgrade on our test server. It ran for about 5 minutes then reported Starting installation of packages upgrading Parallels Panel SQL server... Failed to install 'C:\a168eb93443c6a94b978f09324831b30\parallels\PANEL-WIN_10.3.1\dist-msi-Microsoft-2003-i386\mysql-admin.msi' with error 1618 Error: Action sequence 'upgrade: upgrading Parallels Panel SQL server...' of package 'mysql' has been failed with code 1618 Not all packages were installed. Please, contact product technical support. Recommendations ? Anyone ?