Hi
In Download Layouts select your currently active Downloads layout.
Use the Save & New button to give the layout a new name.
This is new layout is needed in case you are using one of the standard layouts as any update could revert the changes noted below.
In this New Layout you should find the lines
<div class="jd_field_row" style="">
<span class="jd_field_title">{release_title}</span>
<span class="jd_field_value">{release}</span>
</div>
Just Delete them and Save&Close
Set your new layout as the default
Repeat the process for Download Details
Colin