I included 2 files. The launcherinstalled.dat file is in the correct place, as is the included manifest file. The manifest file has the name I used, it is not descriptive of the game name at all.
If I click on the install button, it does bring up the Epic games launcher and lets me install (or run) the game. If the game is installed, the Epic Games launcher opens, I can run the game from the launcher. Launchbox says installing. If I exit the game, Launchbox still says installing with a circle and arrow over the game icon. But nothing is being installed.
If I import the game, and it says it is not installed, the installed badge is not visible for that game.\
I have tried disabling my antivirus because sometimes it pops up with a box for me to allow certain actions, like an app accessing a file. I use BitDefender for my anti-virus and malware.
LauncherInstalled.dat 50F16C6443E63F576077CA89FCF89122.item