libraries/tbs/plugins/tbs_plugin_opentbs.php
function TbsStorePark() {
		if ($this->TbsCurrIdx!==false) {
			$this->TbsStoreLst[$this->TbsCurrIdx] = array('src'=>$this->TBS->Source, 'onshow'=>true);
			$this->TBS->Source = '';
			$this->TbsCurrIdx = false;
		}
	}
function TbsStorePark() {
		if ($this->TbsCurrIdx!==false) {
			$this->TbsStoreLst[$this->TbsCurrIdx] = array('src'=>$this->TBS->Source, 'onshow'=>true);
			$this->TBS->Source = '';
			$this->TbsCurrIdx = false;
		}
	}
Save the last opened subfile into the store, and close the subfile