Most dev on vita focus on improving performance on 3.60-3.65 and to add more function on those firmware. For 3.70+ the restriction by anti hacking make the tools and plugin not able to access a lot of setting/feature, which cause crash and a hell to try fix it, for example Adrenaline ,PKGJ ... so most dev do not touch those firmware.
You can downgrade your Vita to 3.60 or 3.65 and better do it now, since the tools for downgrade has been update to work up to 3.72, before Sony push some 3.73 and block it again.
If you don’t want to downgrade the firmware, then search for the programs you want on GitHub, it should be written there what firmware it supports, although I’m pretty sure that it should all work. By the way, I still recommend downgrading to 3.60, since h-encore isn’t permanent.