After installing i am unable to get to the created web pages

[kingherbstII]

Hi,
I've installed get simple and now when i press the first page that was created i get :
Unable to open /home/freestuff/domains/freestuff.co.il/public_html/getsimple/theme/
the url on the browser is :
http://freestuff.co.il/getsimple/admin/e...p?id=index

I have seen in filezilla that a theme subdirectory was not created so i thought something went wrong during the install process.

How do i uninstall get simple(i can just delete it but i figured there are processes running in the background).

Thanks