Resolved by myself. It was a sidebar that needed to replaced and that I could do by modifying single.php (or single-wpdmpro.php).
Btw. I noticed that a little bug in wpdm_list_categories-function located in wpdm.php. Line containing closing “li”-tags should be inside the if-structure, not outside of it to prevent printing extraneous closing tags.
--- wpdm.orig.php 2013-08-12 11:10:39.144460505 +0000
+++ wpdm.php 2013-08-12 11:10:51.552456606 +0000
@@ -576,8 +576,8 @@
echo "$cat[title]\n";
if($recur)
wpdm_list_categories($id,$level+1, $recur);
- }
echo "\n";
+ }
}
if($parent!=''&&$level>0&&wpdm_cat_has_child($cats,$parent)) echo "";
}