Cannot apply update download on my IMac

Version, English, Draw?
Imac, OS X Yosemite, ver. 10.10 english

Just updated my english LO install to the on my iMac and Mac Book Pro (retina mid 2012) both running OS X 10.10.3 Yosemite -suggest you try this latest release. N.B. I opted to REPLACE the pre-existing install.