Solved by editing two files:
1) /blocks/progress/lang/en/block_progress.php
Add the line:
$string['turnitintool'] = 'Turnitin Tool';
2) /blocks/progress/lib.php
Add the following section after "assignment":
'turnitintool' => array(
'defaultTime'=>'defaultdtdue',
'actions'=>array(
'submitted' => "
SELECT id
FROM {turnitintool_submissions}
WHERE turnitintoolid = :eventid
AND userid = :userid
AND submission_score IS NOT NULL"
),
'defaultAction' => 'submitted'
),
Rgds
Petras
