How do you update to ACR 8.4 in Photoshop CC?

Question

Hello, all!
I hope someone can shed a little light on updating the ACR plugin in Photoshop CC from 8.3 to 8.4?
I'm running LR 5.4, and when I send a photo from LR to PS, a pop up appears saying that my "version of Lightroom may require the Photoshop Camera Raw plug-in version 8.4 for full compatibility.  Please update the Camera Raw plug-in using the update tool available in the Photoshop help menu".
OK, that sounded simple enough.  However, when I do that, it comes back with all of my "applications are up to date", even though the ACR plug-in says it's 8.3.  Searching on the web, I find a lot about ACR 8.4, but nothing about manually updating it, downloading the plug-in, etc.
Any help would greatly be appreciated.
-Jay

Answer 1

Thanks for the suggestions, kglad.
No, I don't absolutely need ACR 8.4, but would like to use some of the new features.  I'd also rather not have yet another app (dng convertor) using additional resources w/PS & LR open.
Bottom line is that I finally got it to update to ACR 8.4.
I went through the dance again with Adobe support trying to get it to update.  This makes about the third or fourth time I've had to contact their support for updates - in the past, it was the CC desktop app that failed to update itself.
I keep notes every time about what is done, and they seem to have the standard process of: 
Ensure AAMUpdater Notifier Process, Creative Cloud process and Acrobat updater process is not running.
Run the Creative Cloud Cleaner Tool for the app
Navigate to C:\Program Files (x86)\Common Files\Adobe -folder.
Delete the AAMUpdaterInventory folder, AdobeApplicationManager folder and OOBE folder.
Click the Windows Start button and type %AppData% and press enter.
Go back to AppData folder, if you are in Roaming folder and open the Local - Adobe folder.
Delete the AAMUpdater folder and OOBE folder.
Delete all the files and folders from temp folder - Ignore the files which are unable to delete it.
In the past, that worked for getting the CC Desktop app itself updating correctly.
However this time, Adobe Support could not get it to update by those and requested that I uninstall all of my Adobe products and reinstall....seriously, Adobe...EVERYTHING?  That would take hours since I use a lot of other Adobe products.
I decided instead to start minimal at first.  I already tried the un/re-install Photoshop, so I did that again, then followed up with un/re-install Lightroom - but ACR remained at 8.3.
Adding one more to the mix, I uninstalled Bridge this time, and I noticed on the unistall of Bridge, it mentioned something briefly in the process window about ACR..hmm.
When I reinstalled all three (Photoshop, Lightroom, and Bridge), ACR was updated to 8.4.  Apperently, Bridge has a hook into ACR that wasn't totally releasing it for updating.  It's probably just my systems, but I had the same identicle results on my laptop as well as my desktop.
Maybe that will help someone, but your mileage may vary!
-Jay