I'm sorry, but I can only confirm the problem is fixed. I checked it again, just to be sure, and I see the LC_5015.BGL file, which is what causes the issue, is correctly removed by the Live Update and, once in the sim, the problem is gone.
After running Live Update, I can confirm that the LC_2319.BGL and LC_2419.BGL were not removed from the KMEM Scenery folder.
I wonder if it's because I also have FSX installed on the same machine. How does the Add-On Manager determine which sim's configuration has priority?