Added a test in the tthumbs element to see if the table has a 'tableid'

field instead of 'listid' (i.e. it was originally installed on 2.x) and
if so, rename the column.

plugins/fabrik_element/thumbs/thumbs.php

@@ -751,9 +751,21 @@ public function install()
 		$db->setQuery($query);
 		$db->execute();
 
-		// Update for comments plugin needs special column adding
+		/**
+		 * Check if we need to update the table ...
+		 *
+		 * Update for comments plugin needs 'special' column adding,,
+		 * Check for older versions of the table needing tableid chenged to listid
+		 */
+
 		$cols = $db->getTableColumns('#__{package}_thumbs');
 
+		if (array_key_exists('tableid', $cols))
+		{
+			$db->setQuery('ALTER TABLE #__{package}_thumbs CHANGE ' . $db->qn('tableid') . ' ' . $db->qn('listid') . ' INT(6)');
+			$db->execute();
+		}
+
 		if (!array_key_exists('special', $cols))
 		{
 			$db->setQuery('ALTER TABLE #__{package}_thumbs ADD COLUMN ' . $db->qn('special') . ' VARCHAR(30)');