Not sure how I did it, but I finally got ACR to install. I messed around with rebooting, shutting down LR 4, etc, but I finally got there. I am a LONG time PS user, but a novice with LR. I installed LR, and am frustated: the ACR version in LR is SO Superior to that in PS, that is why I bought LR. I am still frustrated though (forgive...76 years old)... I cannot do a "save as" . I guessed I need to do an "EXPORT". When I do this it saves as a JPG !!! Damn ....I do not want to do all this work optimizing, and save as a JPG.
Sorry for the rant. We are still homeless on Long Beach Island, NJ living at a friend's home out of the trunk of our car. Have had to turn down print orders since Oct 28 when we were mandatory evacuated. Best guess is we may be back in our home in 4 to 6 weeks.
Beach haven NJ