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Press ok. Highlight all addresses in your imported address book (in this example called 'Addresses') and drag and drop them into 'Personal Address Book'. Check if they are there. Then delete your empty imported address book folder. Done!
Step 4 - Migrating mailing lists
Go into In Courier , click on one of your mailing lists and highlight all addresses in the right panel. Right click in the highlighted area and export you mailing lists one by one list to 'Bulk Mail File'.