It only breaks asymmetric encryption like SSL and PGP. The strength of symmetric encryption, like you have with password protected files and drive volumes, is reduced somewhat but should still be more than sufficient.
And like the other commenter said, there are asymmetric algorithms that are quantum-safe, they just aren't in widespread use (though apparently just this year NIST announced a standard for lattice based cryptography).
I learned better in 2012 when they tried to put an Amazon search bar in their start menu, the same thing people are complaining about with windows today.
If I wanted to use corposhit I would have stayed with windows.