dont download again

oml/downloads.py

@@ -47,6 +47,10 @@ class Downloads(Thread):
                 return False
             if itemid not in self.transfers:
                 continue
+            f = item.models.File.get(itemid)
+            if f:
+                del self.transfers[itemid]
+                continue
             if t.get('added') and t.get('progress', -1) < 1:
                 if not 'users' in t:
                     i = item.models.Item.get(itemid)