Have you thought to contact Avery - they have a very good response system and you will find the phone number on the back of the Avery folder label.
I am a label enthusiast but I only have the Freebie software & it sounds as if you are trying to attach a database & do a label merge. I'm not sure Averys particularly good for that.
You can create your database in WORD then merge it, so you have a label print of all your contacts.
Design your fancy label in Avery - no names and addresses - do a full sheet print - then use this to print again in WORD to put the addresses in.
Brambles (73 year old enthusiast)