I had a minor problem that I wanted to share in case you guys can do something about it or someone else faces it
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First, I double clicked on the installation file from inside the zip folder like you said and it opened little reader automatically but then I got an error message that the file is not the right format (or something to that meaning can you believe I frogot the exact wording in 2 seconds!!).
So i kept little reader open and I went to the zip folder and extracted the installation file (by dragging it out) and then double clicked that and it worked !
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Now I am licensed for 42 more days
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YAY