I know I submit a lot of questions that are likely basic. I still haven't solved the last one that was asked.
I noticed that the "5.3.2" in the bottom of my control panel was now yellow, indicating an update. I was expecting it to be a simple update, but it instead provided the following error:
It looks like your ExpressionEngine installation is using an out-of-date /admin.php or /system/index.php file. Please make sure you have the latest version of each file in place and then try upgrading again.
I did a Google and found this page regarding the same issue from a year ago (and version 4). Unfortunately, when examining my admin.php and system/index.php files and comparing to what he linked in the GitHub, it looks like I have the same file. I followed the manual update instructions when going all the way from 2 to 3 to 4 to 5, but it definitely felt like there were some holes in the process that EllisLabs themselves haven't addressed. Any advice or answers?