Put this in your wp-config.php:
define( 'BP_ROOT_BLOG', 3 ); Replace 3 with the number of the site where you’d like BP to live.
I installed buddypress into my main site. I didn’t like the combination and uninstalled with the intention of reinstalling as a sub domain installation. Now my site is looking for http://www.environmentaide.org/activity. Activity no longer exists and the plugin has been removed. I’ve looked everywhere for the pointer to revert to my WordPress default domain.
How do I remove the activity pointer and move on to reinstall buddypress as a separate site?
I checked the radio button (your latest posts) so the latest posts could be displayed on the blog’s front page, nothing changed. I also tried creating a static page called posts and selected it as both front page and posts page, nothing changed.