You can change the List Server in s2Member, just remove the configuration you have for MailChimp and configure the AWeber one. WP Admin -> s2Member -> API / List Servers
Now, making that change will only cause s2Member to deal with the new service, it won't move the users you have in MC over to AW. You'll have to find the instructions on how to migrate them from one service to the other, probably in the AW support area.
About the screenshot, is that something you get instead of the built-in PayPal Email Parser in AWeber? If so, I'd say you should configure the custom parser for s2Member as Jason instructs in the thread you linked to.Statistics: Posted by Cristián Lávaque — December 13th, 2011, 11:54 pm
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