Install previous version

I have been using V6 for a few weeks now.
I just can't get used to this interface at all.
It's just not intuitive at all with too much going on in one screen.
Can I just reintall a V5 version?
thanks
I just can't get used to this interface at all.
It's just not intuitive at all with too much going on in one screen.
Can I just reintall a V5 version?
thanks