Steps to generate Stealth Seminar's custom metadata fields in Aweber
In AWeber, check that your list has at least one custom field in
List Options->Custom Fields.
If not, create a new custom field with any name. This is a placeholder that will be removed later.
In StealthSeminar, select and sync the fields you'd like to send data to.
In AWeber's Custom Fields screen, click
Save.
The list will refresh, and the fields that Stealth Seminar created should appear. You can now remove any placeholder field you created.