There are registry settings when you install the application builder, and probably an association is made in the registry to open your application and have it spawn the runtime engine of the correct version. However, as the Windows Registry is the most obsolete piece of software junk on the planet, and so chock full of mysteries, incosistencies, and well, a whole list of things that I could complain about, I cannot say for certain what registry settings are added/changed when you do an installation.
I will make this suggestion. Just delete the folder, and also, you will need to delete the "my application".ini file in the root directory, or wherever your application is located (which could be taken care of when you delete the folder, but who knows.)
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ce you have deleted the folder, any remaining registry settings left over will be added to the rather large list of leftover registry entries from other applications that are unistalled/deleted. The truth of the matter is that I have NEVER seen an application completely remove all of itself, or its registry entries. I don't even know if uninstallation removes ANY registry entries.
If we are all lucky, someone at Microsoft will take a hint and get rid of the registry. Maybe then we can have flash resident operating systems. Until then, I'll stick with Linux, thank you....