Lightroom 6 - Install Fails at 99%

I have a Mac and am running El Capitan 10.11.6.  I recently purchased "Adobe Photoshop Lightroom 6 for Mac" (the stand alone program) on Amazon, but I am having trouble installing.  Here are the steps I've followed:

From Amazon.com, I click on "Download," which downloads the Amazon Software Downloader.  I double click on on the Amazon Software Downloader, and then I click "Install."  After that downloads, the icon for Lightroom 6.0 appears on my desktop and a window opens that includes the icons  "Install," "Lightroom 6 ReadMe.pdf," "deploy," "packages," and "payloads."

I click "Install," which opens a window where I can click on "Install, I have purchased..." or "Try...for a limited time...."  I click "Install," which asks me to sign in with my Adobe ID and password.  After signing in, I accept the Adobe Software License Agreement, type in the serial number, click "Install," and then type in my computer's password to allow the download.

Once the progress bar hits 99%, the window "Problem Report for Adobe Application Manager" pops up, saying that the "Adobe Application Manager quite unexpectedly."

Why can't I install Lightroom 6 and how do I fix it?

Thanks in advance,

--Ryan