Annyway - SOLVED! :)
HOW?
1. I have added this line in qa-style.css: .addthis_toolbox, addthis_default_style {float:right; margin-top:-20px;}
2. I have added this line [from www.addthis.com] in qa-theme-base.php: [$this->output('HERE YOUR www.addthis.com CODE!<br /><br />');]
P.S. You can add above code after this line: [$this->output('<DIV CLASS="qa-q-view-main">');]
WITHOUT [ ]