Hi gajy
The uninstall is not as easy as just dumping the icon to trash … I thought that … check out the forums on this site to see how to fully delete…
– you could also have legacy code hanging around from the 32 bit version… so worth a full delete and reinstall from the current download. This article ( and others similar may assist) 64 bit install /delete. I also found getting a copy of the Quartz installer - again listed in the forums somewhere - may help.