I found out that from v1.46 to v1.50 the renew link doesn't show up anymore in the user items.
After looking at the code a bit (Actually a very long time because it was that stupid to find out it was a typo error  ) the solution was simple.
In file model/ModelBO.php
Find and replace
  $this->dao->join($this->getTable_ItemBO() . ' as B', 'i.pk_i_id = b.item_id', 'LEFT OUTER');Replace with
  $this->dao->join($this->getTable_ItemBO() . ' as b', 'i.pk_i_id = b.item_id', 'LEFT OUTER');

@mwindey
Thanks a lot  , we've been updating query here and really missed the letter.
Updated in 1.5.1

@MB Themes,

Welcome 1.5.1 installed and ok now 
It actually took me 30mins to even see the typo with a compare editor... b or B reads the same as human and you overlook it without noticing.

@mwindey
Can believe that