Appointments+ booking calendar not visible in any browser except Chrome.

The Appointments+ booking calendar is rendered in Chrome, yet not available by IExplorer or FireFox…this has only happened since the update. Appointments+ is 1.4.4 Beta and WP is 4.0. Is there a fix? If not, can I get a copy of the last Appointment Plugin from WPMU Dev?

Thanks for your assistance.

JWise