Agrippa: That pixelation is nothing to do with WB. I suspect you tried to apply an icon package and the cache needs rebuilding.
Seronjsky: You do not need this update as it only fixes the problem that an earlier update caused.
I am going to guess you upgraded from an earlier WB version? If so there is a problem with the installer replacing some in use files. The solution is to uninstall WB, reboot, then delete c:\windows\system32\wbload.dll and c:\windows\syswow64\wbload.dllv (if they exist) and then reinstall WB 6.