Hi, I've got the following fatal error message after upgrading to your latest version:
Fatal error: Class 'Rickard\UTCW\Widget' not found in /home/***/public_html/***/wp-includes/widgets.php on line 324
*** = the address of my website.
I've checked the PHP version and it is 5.3.3
Going back to your version 2.1, everything is fine.