Proceeding both yesterday's H-Encore2 PS Vita Kernel Exploit and their previous revision, today Sony pushed live a PlayStation Vita System Software / Firmware 3.72 update which patches doesn't patch the Bitter Smile PKG adding it to the revoke list blocking the game and blacklisting the userland exploit and didn't blacklist the h-encore² on FW 3.72 after all. 
Download: PS Vita Firmware 3.72 Update (US) / PS Vita Firmware 3.72 Update (EU) / PS Vita Firmware 3.72 Update (JP)
Needless to say, it's advisable NOT to update as most PlayStation Vita sceners got a PS Vita or PlayStation TV to do fun stuff like jailbreaking, running exploits and homebrew on the handheld console.
From Sony's PlayStation Asia page, roughly translated: PlayStation Vita 3.72 system update
System software updates for the PlayStation Vita system and the PlayStation TV system released for download on August 27, 2019 (2562). You can use this software to update your system software to version 3.72.
Key features In system software update version 3.72
According to @SilicaAndPina on Twitter the homebrew application Chovy Sign by KuromeSan still allows PSP iSO's to work on 3.72 OFW, as can be seen in the demonstration video from his Silica's YouTube Channel below.
Chovy-Sign - PSP ISO's working on 3.72
How to Install h-encore² on PS Vita & PSTV - Firmware 3.72 or Lower!
Download: PS Vita Firmware 3.72 Update (US) / PS Vita Firmware 3.72 Update (EU) / PS Vita Firmware 3.72 Update (JP)
Needless to say, it's advisable NOT to update as most PlayStation Vita sceners got a PS Vita or PlayStation TV to do fun stuff like jailbreaking, running exploits and homebrew on the handheld console. From Sony's PlayStation Asia page, roughly translated: PlayStation Vita 3.72 system update
System software updates for the PlayStation Vita system and the PlayStation TV system released for download on August 27, 2019 (2562). You can use this software to update your system software to version 3.72.
Key features In system software update version 3.72
- This system software update will help improve system performance.
According to @SilicaAndPina on Twitter the homebrew application Chovy Sign by KuromeSan still allows PSP iSO's to work on 3.72 OFW, as can be seen in the demonstration video from his Silica's YouTube Channel below. Chovy-Sign - PSP ISO's working on 3.72
How to Install h-encore² on PS Vita & PSTV - Firmware 3.72 or Lower!
- PSP2UPDAT-3_710_011-DEVKIT.PUP (193 MB)
- PSP2UPDAT.PUP-3_720._011.I.cex_for_tool.release.type3.qaf.PUP (192 MB)
- sony.txt (4.7 KB)
- psvita-elfs-372-QAF.zip (110 MB - PSVita Decrypted ELFS for FW 3.72 QAF) / GIT
