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Are you referring to the Plaxo email signature on your Outlook Client? As of now, the Plaxo email signature reflects the information from your Contact Card on Plaxo. In order to edit your address, please sign into your Plaxo Online account and click on "View Your Contact Cards" under your name. You should be able to view and edit your details under "My Information". Once you have made the necessary changes, click on "Update Cards" and restart Outlook on your computer. The signature should be updated as per the changes you have made to your Plaxo profile.
Feel free to email me at helpme at plaxo dot com with your queries and I would be happy to help. We ask you to email us due to privacy reasons and we wouldn't want you to post personally identifiable in a public forum.
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