You can turn off the round button “back to top” via css as follows:
Open templates/ja_puresite/css/template.css file,
Change
#ja-navhelper a {
background: url(../images/back-top.png) no-repeat left top;
position: absolute;
width: 40px;
height: 40px;
line-height: 0px;
font-size: 0px;
right: 0px;
text-indent: -9999em;
bottom: -20px;
}
To
#ja-navhelper a {
background: url(../images/back-top.png) no-repeat left top;
position: absolute;
width: 40px;
height: 40px;
line-height: 0px;
font-size: 0px;
right: 0px;
text-indent: -9999em;
bottom: -20px;
display: none;
}
Remember to clear cache from Admin area after applying change above.