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Why can't I get the upgrade 6.0.2 to install?

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I've installed version 5 and version 6 on my computer, but it doesn't replace version 3. I've tried several times to download and install. It appears to be successful, but version 3 is what I get when I click the icon on my desktop. Windows Vista

I've installed version 5 and version 6 on my computer, but it doesn't replace version 3. I've tried several times to download and install. It appears to be successful, but version 3 is what I get when I click the icon on my desktop. Windows Vista

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由 Swarnava Sengupta 於 修改