To start with I didn't know where/what my Corona installer was. Didn't realize it was this file called "hotfix" in a folder right on my desktop. I was staring and staring at your instructions Mmarcotic/Jan, not exactly understanding, but then did check out a video on installing corona and saw the guy clicked on that same "hotfix" file and finally realized that was the installer.
Once I realized that, I combined what you said about looking for R23 in the Custom part, with what CineMike said earlier about Corona 6, and figured out what to do. And now I have it! Thanks.