When upgrading to LR 4.x, what do I do with previous versions of LR saved on my hard drive?

I have the last version of LR 3 installed on my PC.  When I upgrade to LR 4.x, should I delete all previous versions of LR from my PC hard drive?
Ken

You can, but it's not mandatory. Generalyl it's a good idea to keep old versions around for a while in case there are issues while migrating to the new version... If you uninstall, do so before installing the new version to avoid issues with busted file associations and the like. Just make sure to back up your catalogs and settings properly...
Mylenium

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    Messaggio originale----
    Ogg:  I bought LR 5.7.1 but when I try to register the product it ask me a previous version of LR that I have not, what to do?
        I bought LR 5.7.1 but when I try to register the product it ask me a previous version of LR that I have not, what to do?
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