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Accidentally hit "Always" instead of "Just Once"

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Now any time a pdf is opened, it immediately jumps to Google Drive pdf viewer. I tried going to app management and resetting app preferences, but nothing changed.

Now any time a pdf is opened, it immediately jumps to Google Drive pdf viewer. I tried going to app management and resetting app preferences, but nothing changed.

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How do I get it to ask what I want to do with pdf's again?