Also, the driver (Inventek_Systems_eS-WiFiDemo_v1.5.4.b10.exe) is flagged as a virus by windows SOPHOS antivirus software.
Unfortunately the zip file contains the patch in exe extension. My company's virus scanner renames it to exe.rename. With an exe extension, I don't think I can unzip it on mac. I have tried renaming the file to different extensions say .gz, .zip, .tar, tar.gz and I couldn't decompress to apply the patch.
So seems like I need the patch in a diff file and I can then easily apply it on mac.
The patch worked. I renamed it to exe and applied the patch on 3.1.2.