Restore Spirit to default settings

Hello One and All,

I am new to this site and as matter of fact new to Wordpress itself, decided to teach myself something new. I have played around with the Spirit them to get a feel for it, removed this, added that, changing pictures, backgrounds, colours, etc.

I could not set a reset to default setting button so I figure I would just uninstall the theme and then install it again and be back at it like I was looking at if for the first time. The problem is that all my changes are still there after deleting and then installing again.

So tell what I am doing wrong and remember new guy here so beginner instructions please.