BuddyPress Upgrade ?

Hello,

I know I just screwed things up.
I saw the notice on the admin board that I needed to upgrade my BuddyPress.
I read the instructions and tried to do as I was told.
When I got to deactivating my bbpress group calender, a message came up that said fatal error relating to the calender.

So I went and deleted that file by ftp. Then I thought , well maybe I should delete all the buddypress stuff from my server and start fresh.

I thought I had done that, downloaded a the latest version, & followed the instructions to upload it.

When I go to the activate plug ins screen it is not there.

All my blogs are OK except for the main page which was the only one that had buddy press.

What do I need to do?

the site is http://onlineaor.com/