Reply to Big problem with VCI 100

Today I recived my VCI 100.
The Traktor LE CD that came with it got slight broken and now I cant install it.

Now I have a few questions , please be kind to answer me :
1.I downloaded the demo version of Traktor 3.
Does it have the same options as the Traktor LE?

2.When I tried to use the crossfader it didn't work at all as well as the volume faders of the 2 decks (sorry if Im not being exact on the names).
Is it connected to the traktor version?

3.Im not hearing the same volume on both decks when I play there a song.
(can't move between 2 decks because crossfader isn't working) , so I just tried to see if the volume is the same on both decks , it appears not.

4.In case the faders don't work in the LE\Demo version whatever , only if I upgrade to Pro I can get this features or I can upgrade to a lower level of Traktor and still get it?

P.S : Im not using a soundcard atm so I kinda get lame sound from my speakers , does it affect other stuff?

Edit : I saw that Demo and LE version are 2 different things.
Is the LE version downloadable?

Dan.