Hi beacon, and welcome to Piriform.
There're guys on here who are more genned up on using Recuva than me, but I can give you some initiall advice.
Firstly, there's a very good guide on the
Piriform Docs site.
Secondly, you need to leave the version alone on your hard drive, as any disk activity could overwrite files you are trying to recover. You also need to download the latest version from the following link.
http://www.recuva.com/download/buildsChoose the
portable version which you can download onto a thumb drive, once again not writing to your Hard Drive which could overwrite files.
If you don't have a thumb drive, this might be a good time to get one, or you could use a Camera Card, which is no different to a flash drive. You can put any files on them besides pictures.
I can't think at the moment where you could have lost all your "My Documents" folders, but for now I hope this helps.