How to use FSAL so either 12.2.1.4 or 12.2.1.3 will work

I have Forms 12.2.1.3 working on production servers using the Forms Standalone Launcher. Users have a small app on their desktops that run java with the 12.2.1.3 frmsal.jar and pass a URL to the prod servers. I recently upgraded a QA server to 12.2.1.4 and discovered that the existing FSAL launcher (with the 12.2.1.3 frmsal.jar) would not work with Forms 12.2.1.4. I downloaded an updated frmsal.jar from https://myserver.mydomain.com:8890/forms/html/fsal.htm , deployed that to a user's desktop, and that worked.

When I try to use the 12.2.1.4 frmsal.jar with the existing Forms production server 12.2.1.3), it does not work. It does not seem to be backwards compatible. Summary: