BuddyPress.org

Hmm… @johnjamesjacoby; I did as you suggested, then disabled all BP plugins and BP, deleted the BP files, and copied the new ones in. The readme.txt is still code by the way, starting with;

<?php
define ( ‘BP_XPROFILE_DB_VERSION’, ‘1870’ );

/* Define the slug for the component */
if ( !defined( ‘BP_XPROFILE_SLUG’ ) )
etc., etc.

On activating the new BP I get;

Plugin could not be activated because it triggered a fatal error.
Fatal error: Cannot redeclare bp_loaded() (previously declared in C:xampplitehtdocswp-contentpluginsbuddypressbp-loader.php:55) in C:xampplitehtdocswp-contentpluginsbuddypressbp-loader.php on line 56

Everything else in WP and BP has been running fine so far.