Can't get into Custom API Configuration

@willsterstyle: The issue can be because of some error in the configuration you provided in the backend. In such cases, the plugin defaults to the original configuration. Can you share the configuration you have provided? Or try the following setting and let us know if it worked?

{
theme : 'transparent',
share : {
    'position' : 'right',
    'services' : 'facebook,twitter,email,print,more',
    'postShareTitle' : 'Thanks for sharing!',
    'postShareFollowMsg' : 'Follow us',
    'postShareRecommendedMsg' : 'Recommended for you'
},
follow : {
    'services' : [
        {'service' : 'facebook', 'id' : 'AddThis'},
        {'service' : 'twitter', 'id' : 'AddThis'}
    ],
    'title' : 'Follow',
    'postFollowTitle' : 'Thanks for following!',
    'postFollowRecommendedMsg' : 'Recommended for you'
}
}

@willsterstyle: Sorry, I got confused there.

Going through your original question again, it looks like you are having a JS error in your admin page. It might be from your theme, another plugin or a conflict with AddThis Smart Layer plugin and another plugin. It will be helpful if you can check it and let us know.

If you are not sure how to do this, take a look here: http://codex.ww.wp.xz.cn/Using_Your_Browser_to_Diagnose_JavaScript_Errors#Chrome

You may send a screenshot of the error to srijith[AT]addthis.com.