Up until now, the Aquarium has always used a self-extractor which I licensed from WinZip. The Aquarium exe file contained everything it needed to unzip itself and the WinZip program did not need to be installed on the computer.
However, some systems gave you the option "UnZip with WinZip?", and if the person chose "Yes", then WinZip needed to be present.
I don't know what the new Prolific installer uses, but I imagine it is self-contained.
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