You mean install the newer beta as well? Then copy/rename those files over to the original installation. Then I guess uninstall the newer one....???
Wouldn't it be easier to uninstall and start over with the license number they gave me?
You're overthinking it.
Just download beta 10a and drop the file wherever you want.
No need for an installer, uninstaller, or any other gymnastics. Just download it and use it.
The Aquarium didn't even have an installer for its first 2 years on the market. It was only after constant requests for an installer that one was added. And all it does is create a couple of folders and move the Aquarium to the right place. Something you can do yourself in about 3.5 seconds.