The PSVita just got a new exploit/old exploit for firmware 3.71 but as soon as that released Sony didn’t hesitate to release a new FW update 3.72 but was it all just a coincidence. At first, a lot of people, even The Flow thought the game exploit bitter smile got blacklisted but it wasn’t.
So this update didn’t do anything to h-encore and the same goes for, custom themes, PSTV Whitelist hack, VHBL, or the other pboot bubbles, all of them still work just fine on FW 3.72.
All that is needed to use h-encore on FW 3.72 is the updated binaries files.