[CMX_CMGSCCC]

Here's the code..

// always unset the old vbBux / vbPlaza version number
vbplaza_printf("<p>Cleaning up the settings ... ");
unset($vbulletin->options['vbbuxplaza_version_number']);

// rebuild the vbplaza datastore
require_once(DIR . '/includes/functions_vbplaza.php');
vbplaza_update_datastore(true, '', '');

// rebuild the bitfields
require_once(DIR . '/includes/class_bitfield_builder.php');
vB_Bitfield_Builder::save($db);
build_forum_permissions();
vbplaza_printf("Finished.</p><p><b>ALL DATABASE UPDATES COMPLETE!</b></p>\n");

The only possible way I could see it failing is it you did not upload includes/functions_vbplaza.php, as the rest of the code is to fix bitfields.

I'll add code to the next version to verify that functions_vbplaza.php is included!

-CMX