Change lines 685-687 to the following in appStore-main.php
<a href="<?php echo $appURL; ?>" target="_blank"><img class="appStore-icon" src="<?php echo $artwork_url; ?>" width="<?php echo $newImageWidth; ?>" height="<?php echo $newImageHeight; ?>" /></a>
<div class="appStore-purchase">
<a type="button" href="<?php echo $appURL; ?>" value="" class="appStore-Button BuyButton" target="_blank"><?PHP echo $buttonText; ?></a></br>
I will add this in the next release as well.