Anyone else having a 0kb pso2.exe?

[Achelousaurus]

This happened for the 3rd time now.
I only use the tweaker, don't use any tools at the moment and not even the official launcher.
Every time my pso2.exe is 0kb and I have a pso2.exe_backup that is the real thing in the same directory.
Not a big deal because I can just rename it but any idea why this happens?

[TaigaUC]

Never had that. Have you checked for viruses?