DolcePolce VS modoru

To play blacklisted games install DolcePolce plugin.

so download the plugin (https://github.com/KuromeSan/DolcePolce/releases/tag/v1.0)

All of it

I think you want Dolce Polce

DolcePolce PSTV blacklist hack, replacing Antiblacklist and Whitelist (Silica)

It works for me, have you installed DolcePolce.

It is really the same process as hacking a 1000/2000 vita, this is why the guide does not differentiate between the models. Use dolcepolce to whitelist games that would normally be blacklisted for PSTV.

-3.69/3.70 users can still safely downgrade with Modoru

Modoru Vita firmware downgrader (The FloW)

You didn't told what fw you're in but maybe try this https://github.com/TheOfficialFloW/modoru

There's a sticky in this reddit that will help you. Most people either update their firmware to 3.60 or 3.65 for a semi-permanent hack (henkaku/enso) or use modoru on an already hacked vita to downgrade to them from a higher firmware including the latest 3.74 firmware. The link in the sticky https://vita.hacks.guide/ is where to start. If you specifically want a particular system update file for modoru https://github.com/TheOfficialFloW/modoru you can find them here https://darthsternie.net/ps-vita-firmwares/ amongst other places. Please note that some Vita's came with firmware above 3.65 pre-installed. These cannot be downgraded with modoru but you can still use h-encore/h-encore2.

To downgrade: You need Modoru 2.3 (for fw 3.74) https://github.com/TheOfficialFloW/modoru

google... https://github.com/TheOfficialFloW/modoru

That's the whole point. You rename the tai folder, reboot and run modoru. It's even mentioned on it's official github.