What last changes do you made on website?
Also try to reupload Visual Composer plugin.

Regards,
Robert Hall.

Hello,

Please provide us with link to the page and wp-admin access in Private Content.

Regards,
Robert Hall.

Hello,

You can download a new version of Legenda theme (2.4) on themeforest. Also in archive file you can find a latest Visual Composer /legenda/framework/plugins/js.composer.zip

Regards,
Robert Hall.

Hello,

We’re sorry, but our themes are compatible with browsers IE9, IE10, IE11, Firefox, Safari, Opera, Chrome. You can read this here: http://themeforest.net/item/legenda-responsive-multipurpose-wordpress-theme/5888906

Regards,
Robert Hall.

Hello,

You’re welcome!

Regards,
Robert Hall.

Hello,

Add this code into custom.css file.

#top-cart {
line-height:27px;
width: auto;
}
#links {
margin-right: 10px;
}

Regards,
Robert Hall.

Hello,

Legenda theme 2.3 is full compatible with WP 4.0, don’t worry about that.
In a new theme we have the ability to edit styles too. Design of this theme is not changed.

Regards,
Robert Hall.

You are welcome and thank you for the feedback.
We really appreciate it!
It would be great if you provide us with the translation file.

Regards,
Robert Hall.

Hello,

We’re sorry. The issue will be fixed as soon as possible.

Regards,
Robert Hall.

Hello,

Add this code into custom.css file.

.links li.my-account-link{
display:none;
}

Regards,
Robert Hall.

You can change image there. Navigate to Pages->Home->and look at screenshot: http://prntscr.com/4nxgjg
If you want change background color, then you can add this code into custom.css file.

.banner-snowboard .wpb_wrapper {
background: red;
}

Here is a video tutorial how to create custom.css: https://www.youtube.com/watch?v=Qok2zRedRMY&feature=youtu.be.

Regards,
Robert Hall.

If you want add image and nice menu, then there should be a submenu with class et-col as it was edited by me.

Regards,
Robert Hall.

Hello,

Please provide us with link to the page and wp-admin access in Private Content.

Regards,
Robert Hall.

Hello,

Add this code into custom.css file or style.css of the Child Theme.

.portfolio-item .post-info, .blog-post.post-grid .post-information .post-info{
display:none;
}

Your configuration of the child theme is good. This status does not affect to work with your theme.

Regards,
Robert Hall.

Hello,

If you read this topic attentively http://marketblog.envato.com/general/plugin-vulnerability/ you know that recommended version is 4.2 or higher. Legenda 2.4 includes Revolution Slider v. 4.6. Also we have sent it to you.
If you updated your theme, always check if you updated the included plugins too. Last versions of plugins you may find in theme package (legenda/framework/plugins).
Don’t worry, Legenda theme is compatible with WordPress 4.0.
You can download a new version of the Legenda Theme (2.4) in Downloads area of your account on themeforest.

Regards,
Robert Hall.