Contact Importer Settings
Yahoo Contact Importer Settings
Windows Live Contact Importer Settings
Google Contact Importer Setting
Do you want users of your site to be able to invite their friends to your site using all the available web accounts on your site? (If you select 'Yes' over here, then you will be able to choose below the various web accounts.)
Select the web account services that you want to be available to users of your site for inviting their friends.
Do you want the 'Invite' link at the main user navigation bar to point to the Invite Friends page of this plugin. (If set to no, the 'Invite' link will take the users to the Invite Friends page of core 'Invite' plugin.)
If your site runs on "HTTPS" then enable this setting. This setting is used when site user use the invite Facebook friends funtionality on your site.