To upgrade your user license, go to the clientarea (http://www.interspire.com/clientarea/) and copy your new license key.
Once you have done that, log in to Interspire Email Marketer and go to the settings page.
Paste the new license key into the 'License Key' box at the bottom.
Interspire Email Marketer will log you out.
Once you log back in you will have more Interspire Email Marketer users.

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