I am trying to find out if my ACR for CS3 is up to date but can't seem to find it. Can someone give me the path as to where it is located, please.
Suzi,
The last version of camera raw for CS3 is version 4.6. No newer versions will be supported unless you upgrade to CS4! If you want to support new cameras, you'll have to use the free DNG converter (currently version 5.1) or to use PSE6 or PSE7.
Open a raw file and click the preference icon on the top of the screen, next to the red eye tool. This will show you your present version.