This is the WP message I got when I tried to activate the plugin (I tried installing twice - same error message each time):
Warning: require_once(/home/goodlife/public_html/wp-content/plugins/backupwordpress/functions.php) [function.require-once]: failed to open stream: No such file or directory in /home/goodlife/public_html/wp-content/plugins/backupwordpress 3/backupwordpress.php on line 31
Fatal error: require_once() [function.require]: Failed opening required '/home/goodlife/public_html/wp-content/plugins/backupwordpress/functions.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/goodlife/public_html/wp-content/plugins/backupwordpress 3/backupwordpress.php on line 31