Unpacking software on Windows machines

Sometimes one may obtain new software from GAMS off sites like Rutherford's in packed or zipped format.  One can unpack this in the IDE using the update button that appears on the file options dialogue under the execute tab just to the right of the executable name box.  This will allow unpacking of all zip or pck files in the GAMS system directory, but the user is prompted with a list before this happens.