Plugin is not working anymore since last update

Hi support team.
I got a serious issue since I upagraded my popup pro plugin...Indeed this last one is not working at all anymore.
I double check the settings nothing changed...and even the PREVIEW does not work also...it only display a spinning wait cursor and I have to press the backspace key to get back access on my wordpress admin page.
Could you please send the PREVIOUS version or tell me what's happening.
My WP is 4.0 my theme is puzzles, and jetpack is also installed.
Thanks for your support.
regards.
Christophe