After I updated my Parallels to 13 on MacBook Pro 15 Retina, I got blurry full screen on my Windows 2000. I set the Windows' resolution to 1440*900 (which is half of native resolution of MBP 15) and it was really sharp on Parallels 12 since they rendered everything 2x. That's seems no longer the case on Parallels 13. Any ideas on why and how to solve this problem? Thanks!