Unable to turn off Automatic Disconnect in sql script with version 6.1 (49854)

In SQL Navigator version 6.1, it's not possible to  turn off Automatic Disconnect in sql script as is possible to do in SQL Navigator  version 5.5.

To reproduce the issue please follow the steps below (in both SQL Navigator versions)

1. Paste this script into the sql editor (changing schemas, passwords and dblinks)

CONNECT USER1/PASSWORD@DATABASE
SELECT * FROM dual
/
CONNECT USER2/PASSWORD@DATABASE
SELECT * FROM dual
/
CONNECT USER3/PASSWORD@DATABASE
SELECT * FROM dual
/

2.  Select all lines in the script and press F9

3. Compare 'Current session' combo box and task bar on both SQL Navigator.  

Version  5.5  has the correct behaviour. It only allows  to connect and retrieve data which will be displayed in the spool tab.

WORKAROUND:
None

STATUS:
Waiting for fix in a future release of SQL Navigator for Oracle