Got it to work. I thought i should share some stuff i found.
Create the app folder and UPDATE365 first.
Don't run VitaShell before updating, that'll screw up the update (gives you a warning to reboot).
Upgrade vitashell to 1.82 and then use AppStorageManager to move it to ur0 (you should have done this anyways). App Storage Manager:
https://bitbucket.org/Lupo511/appstoragemanager/downloads/
If you run into a problem installing vitashell, make sure it's not in ur0. If it is, use appstoragemanager to move it back to ux0. Things in ur0 aren't updatable.
Here's where i got confused/sidetracked:
After you install updater.vpk it will create files/folders in app/UPDATE365 and delete anything that's in it. So if you moved PSP2UPDAT.PUP in the folder before installing updater.vpk, you're doing it wrong.
After updater.vpk has been installed, then copy the P2PUPDAT.PUP in the folder.
Uninstall enso (run enso installer, hit 0 to get past the warning, then hit triangle to uninstall).
Reboot
run updater.vpk. It has two warning screens with 20 second delays.
You can use the molecular shell instead of vita shell before you update. If you need to use vita shell, you'll have to reboot before using the updater.
If you don't have molecular shell, just hit the L trigger when using the browser henkaku enable method.
Tips:
After uninstalling enso or after installing the update, unsafe homebrew is checked off. You'll probably want to go back into settings and fix that.
The config.txt in ur0:/tai has been streamlined a bit (?). Just copy your plugins back in there. Also check this guy's repositories for updated plugins.