Are you talking about Acrobat or Reader? Acrobat is not a simple free download to be run. The updates for Acrobat are available at http://www.adobe.com/support/downloads/product.jsp?product=1&platform= Windows for Windows machines and a similar address for MACs. If you actually had Acrobat, then after you delete it you would have to reinstall it from a backup or hopefully still have access to the download based on your store access (I don't use the store and am not sure how this works online). If you succeeded in downloading it as you suggest, I would strongly recommend making a backup on CD or other drive for the future (they do not keep older products available for download).
I assume you have installed Acrobat. I am not sure about the version you are talking about with 2300. There is no such update listed by Adobe. Normally, when Acrobat is installed you simply install updates from the Help menu within Acrobat by asking Check for Updates. If I have missed the point, then you need to explain a lot more so we understand what you are asking. Also, what version of Acrobat are you talking about?
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