1.Update your Tweaker to 188.8.131.52.
2.Reset the Tweaker settings by going to Tweaker Settings -> Reset. Once it reopens, follow the directions to install NA. (Hit no to the guide, then select "I don't have PSO2 installed", then select "NA".) !!!Do not install PSO2 into the ModifiableWindowsApps\pso2_bin\ folder!!!
3.Follow the directions until the program restarts and starts to patch.
4.Enable Developer mode in Windows 10 - This is required to install the game and link it to the Windows store https://www.howtogeek.com/292914/what-is-developer-mode-in-windows-10/.
5.Once it finishes patching, download this file: https://arks-layer.com/docs/pso2_winstore_fix.ps1. Put it in your PHANTASYSTARONLINE2 folder (not your pso2_bin folder, the one above it!). Right click it and select "Run with powershell". It may prompt you about changing a policy - Just hit Y. Wait until it says "Fixes complete!", then press any key.
6.Rename your Program Files\ModifiableWindowsApps\pso2_bin folder just to make sure it doesn't try to launch from there for some reason.
7.Hit "Start PSO2" and enjoy!
7+.Optional final steps: 7) Turn developer mode back off (It's only needed for the initial install/linking) Clean up all the old Windows Store folders and junk data on your computer and get that space back! Thx to Allianc3d.