SIW 1.64 is unable to save its configuration file.

The options are saved in an xml file called "C:\Documents and Settings\%USER%\Application Data\gtopala\SIW\siw_init.xml" (Win NT, 2000, XP, 2003 or Vista) or "C:\WINDOWS\Application Data\gtopala\SIW\siw_init.xml" (Win 9x). SIW 1.64 fails to create the "gtopala\siw\" folders if they don't exist before creating the options file. Workaround: manually create these folders. Thanks to Michel Cote for reporting this bug.