The legendary hack (which persists after a full power-off) was designed for 3.60 and ported to 3.65. It has not been officially ported to 3.74. While developers have made partial progress using YAMT (an alternative storage driver), there is no simple installer to make 3.74 permanent. You will be stuck with "tethered" CFW, meaning you must re-run the exploit after every full shutdown.
Console bans on the PS Vita are incredibly rare. Sony has historically focused its banning efforts on the PS3 and PS4. To minimize risk, avoid cheating in online multiplayer games and do not sync illegitimate trophies to your PSN profile. Is it safe to downgrade from 3.74? ps vita 3.74 firmware
Inside VitaDeploy, select (the essential file manager for the Vita). Go to Install a different firmware within VitaDeploy. The legendary hack (which persists after a full
The update permanently disabled the ability to transfer content between a PS3 and a PS Vita. This is considered the biggest drawback for users who relied on this method to manage their libraries or access content only available via PS3 transfer. You will be stuck with "tethered" CFW, meaning
A menu will load on your screen. Select and then choose Replace NEAR with VitaDeploy . (The legacy "Near" app will serve as the gateway to your custom software). Step 2: Install HENkaku and VitaDeploy Exit the browser and open the modified Near application.