Hi,
The file is still modified, it does not match the original. These two lines are different:
<fieldset class="asp_custom_f<?php echo in_array($item->asp_f_type, array('checkboxes', 'radio')) ? ' asp_sett_scroll' : ''; echo $x_in++; ?>" >
and:
<select class="<?php echo w_isset_def($item->asp_f_dropdown_search, 'asp_unchecked') == 'asp_checked' ? 'asp_gochosen' : 'asp_nochosen'; echo $x_in++;
Please note that I cannot guarantee support for modified versions of the plugin. Changing core files may result in a plugin malfunction unfortunately. I recommend reverting back this file to the original, that should resolve the issue.