P21C Legacy SDTMIGv3.1.3 Validation

I have a legacy SDTMIGv3.1.3 study which is planned for inclusion in an upcoming submission. eSUB package was unfortunately not created at the time of study completion.

It seems FDA Legacy engine 2204.1 was the last available for validating SDTMIGv3.1.3 in community. Though I see the config files, It does not show in my ‘Engine’ drop down in P21C. Is there a way to force this engine to be available for use since I have the config for it?