Hi Naveen,
It should be in C:\Users\<username>\AppData\Roaming\Neolane\NL_5 .
You can simply type %appdata% in the Run box and should land in Appdata/roaming folder . From there search for neolane and inside it the NL5 folder . there will be a file called nlclient_cnx.xml and several other .xml files. These XML files contain the Urls and cached preferences.
You can either delete all the .xml files or just rename the NL5 folder and then install the console and all the preferences would be gone.
Regards,
Adhiyan