Click Contacts from your Hello Bar Dashboard > then click the name of the list you’d like to sync with AWeber > click  Edit on the right side of that window > change the drop down titled Where do you want your contacts stored to AWeber

Simply follow the directions to enable syncing with AWeber from this point forward.

Go to contacts and click on your contact list name and then hit edit.

-Select Aweber from the list.

Hit Connect

Login to your Aweber account then 

Select the Aweber contact list to sync Hello Bar to and finally hit Done