If I need to export/copy 3 newsletters from the old and insert them in the new site. I can edit them, copy the source then paste it in a new newsletter in my new site.
I have this from an earlier post:
To move all your AcyMailing data from one site to another you can use our migration procedure: www.acyba.com/acymailing/292-migration-procedure.html
If you really need to export only those 3 newsletters, you can edit them, copy the source then paste it in a new newsletter in your new site.
I don´t know how exactly to do this!