Solution for this topic

To open it in new window please use the attached small plugin specially developed for you that contains some custom code.

I would also like to change the color of the sign-up button “rollover” color if possible please?  It’s currently orange

You can change button hover color by adding the following CSS code in the Custom CSS code option of your theme on the below path.

Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code

#page-container a.sh-event-button:hover {
    border-color: #e9226f;
    background-color: #e9226f;
    color: #fff;
}

You can change the color value in the above code to whatever you want to use by referring the following pages.

http://www.w3schools.com/html/html_colors.asp
http://www.w3schools.com/html/html_colorvalues.asp
http://www.w3schools.com/tags/ref_colorpicker.asp