I am using Theme Triada with 16 Widgets usng WordPress

I am using Theme Triada with 16 Widgets usng WordPress 3.5.1.

Error message:
Fatal error: Call to undefined function get_current_screen() in /home3/seniorsf/public_html/managinglifeschanges/wp-content/plugins/wooslider/classes/class-wooslider-settings.php on line 308

I have spoken with HostMonster and walked the installation steps through with them. Adjusted SMTP and CRON settings. Changed the + to a @ in the address fields.

Any ideas would be great.
Thank you
Ronald