Hello Softrak tech support.

Thank you for your additional suggestion. I was able to resolve this issue, and suggested to the site, upgrading workstations to Windows 10.

I went through add/remove programs and uninstalled the novaPDF SDK10 SDK COM (x86), Adagio Payables, and SAP Crystal ... Then I ran the Payables Workstation setup executable, using "Open", rather than Run as Administrator. After this, Adagio Payables 9.3B opened successfully, without the workstation setup loop. I don't know precisely which of the above efforts resolved the issue - but all is working presently.