You need to first delete all but your Default themes. The one set in your Nuke Admin/Preferences would be your Default.
once you have ONLY your default theme installed in yoru themes folder, then run this script.
Code:
<?php
######################################################
# After you used this file, you can safely delete it.
######################################################
# -= WARNING: PLEASE READ =-
#
# NOTE: This file uses config.php to retrieve needed
# variables values. So, to do the upgrade PLEASE copy
# this file in your server root directory and execute
# it from your browser.
######################################################
include("mainfile.php");
####################### BEGIN THE UPDATE #######################################
// clear theme
$db->sql_query("UPDATE ".$prefix."_users SET theme=''");
copy and save that as
cleartheme.php and upload it to your MAIN nuke directory. Then point your browser to it. That will clear all the user's selected themes and force them to the default one.
mikem