I just installed PSO2 today and downloaded Tweaker from their site. I started it up and said "yes", I have PSO2 installed and it noticed there was a new version of Tweaker so I let it update. Now it crashes every time I open it. RIGHT when it starts. I have Windows 8.1 and my .NET is up to date. I tried installing the .NET 4.5 and the installer told me it was up to date.
Someone help, please. I've been googling for hours now.