Update Failure Code U44M2P28: Lightroom 6.1.1 to 6.5 (perpetual license)

[Sterling Photography]

I have Lightroom 6.1.1 installed (perpetual license) and want to update to 6.5 (perpetual). I located the update, downloaded it and attempted to install it. But the Adobe Application Manager tells me the installation failed, error code U44M2P28. [I've   tried with earlier updates, and have gotten similar results.]

Here are the details. To prepare for the update, I applied Simon Chen's permissions fix (Lightroom 2015.5: Won't start. Ask to change permission of folders, but that doesn't solve. | Photos...).

I downloaded the 6.5 update and activated the installation. But I got the following failure window:

        

The error log is a single page with this on it:

          Lightroom CC/6 Update – March 2016

          Update is not applicable. Error Code: U44M2P28

Any help would be appreciated. I'm beginning to think that I won't be able to apply ANY updates.

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If I should need to uninstall then reinstall my current version (6.1.1), where can I get a fresh copy to install? If I need to uninstall 6.1.1, how? The Adobe Applications Manager won't open. Can I use any other uninstaller that deletes all application's files?

[John T Smith]

U44.. update error http://forums.adobe.com/thread/1289956 may help

[Sterling Photography]

Thanks, John. I'd already come across this reference in the forums. I'd like to give it a try, but I assume that after uninstalling 6.1 I'd need to install 6.0, then the 6.5 patch. But I don't have a 6.0 installer and don't know where to get it.

But another problem is the suggestion to use Adobe's Uninstaller. I don't have that either. Can I just use a competent uninstaller like AppZapper, which deletes all the accompanying library files?

[Guest]

Thanks for the info

TK

[Sterling Photography · Accepted solution]

I got an answer. The key was finding a source for LR 6.0, which I got (with all the 6.0 updates) from this Adobe link: Install Photoshop Lightroom.

I then used AppZapper (Mac) to delete LR 6.1.1. I used Steve Chen's permission fixer, then installed LR6.0, then updated it to LR6.5. It worked, and all's well. Thank you tipsters!