I've not used LR before. Will be hitting the tutorials. I have PS4. I've upgraded LR to latest. Is ACR in LR or do I have to use both PS and LR to process RAW files ( or whatever Oly calls them )? Didn't want to pay for PS upgrade if I find LR is all I need. So I don't mind paying for an ACR upgrade if it works with LR. The latest ACR will not work with my old PS. Am I being clear? Thanks for any help.