What version of LabVIEW do you have?
These tools are found in the section "Application Control" in the functions palette. Also check the online help for more details.
Left to right:
"Current VI's path" provides the path to the current VI.
"Open VI reference" opens a reference to the VI.
"Invoke Node" acts on the VI, select "Reinitialize All to Defaults".
"Close Reference" closes the reference.
I have attached a simple example for demonstration (LabVIEW 7.0). If you have an earlier version, use the LabVIEW Player 7.0 to open (...or let me know and I convert it to an earlier version).