ExifTool problem

[raffychan]

Hi,
I'm pretty new to xnview, and I'm trying to fix my picture metadata.
First I installed xnview on Ubuntu, via wine, and then on Windows 7 and I have an issue with both.
When I try to edit GPS data, this error pops out: "Please install ExifTool in AddOn folder".
I've searched everywhere and haven't been able to find ExifTool. Where can I download it?

Thanks

[xnview]

Here