You don't say which OS you are running. There is a specific file type for Finale templates when running Windows. For the Mac, they just need to be placed in the Templates folder. Double check the Readme documentation for the exact location.
Ted Boliske
Mac OS 10.12, 10.14, 10.15, Win7, Win10 VDL2.5.5, Finale 2010-14.5, Finale 25-27 Kontakt 4-6, various other soft synths