I know this isn't much help, but I have the same version running on a MaBook Pro (El Capitan) and a MacPro (Yosemite) and am not experiencing problems. One idea would be to get your hands and a full installer and reinstall. I'm not sure where you'd get this.
Check your plugins. Disable them all and see if that makes any difference. Then start adding them back in. I had issues with the Clip Manager plugin.