The error when I tried to update to 2.0.1 was “Cannot remove old plugin” or similar.
The result was the same as above
Fatal error: Class 'BBP_Theme_Compat' not found in /var/www/karting/www/wp-content/themes/karting2011/functions.php on line 46
I deleted the bbpress folder from wp-content/plugins and then uploaded version 2.0.1 from here:
https://wordpress.org/extend/plugins/bbpress/
To the same place as the old folder. The template for bbpress in my theme were untouched.
This got the site working again.
