GameEx and GameEx Arcade Edition have been combined into a single installer and should cover every Windows operating system since and including XP. I spent a lot of time optimizing and cleaning up the installer as well as testing on many operating systems and platforms. They both share the same files and config but the Setup Wizard will show the appropriate options for both versions.
Main thing to note when upgrading for the first time is the install will use the install folder for GameEx not Arcade Edition.
It seems like a simple nice and obvious improvement but all this required a lot of work and testing.
It does mean one installer build and upload for me too which helps.
There are also a few bug fixes and optimizations.