That folder is for the updater for each version, if you have 1.0 you must uninstall it and reinstall
this. After installing click on check for updates to download the most recent update.
It's in the main page from moddb and EF how do you missed that and use 1.0 instead
? The 1.2.0.0 patch is a full functional version. Yo don't need anything below that
.
Even if you have 1.1.1.1 is recomended to uninstall and install 1.2.0.0. That's because the "major" patches have a lot of changes.