Thanks a lot man, you're right.
Honestly, a few days ago I did the same thing and there wasn't any possibility to install it. There was one - download manual installer of FC3 and try to install it by this way. It didn't work.
Now I did the same thing and my DCS told me that I've got one module to install, so I just clicked install button and now everthing's fine.
Thanks a lot once again. :)