Shahjada

add following css at the end of your theme style.css

.modal-backdrop, .modal-backdrop.fade.in {
    opacity: 0.8;
    z-index: -999 !important;
}

its compatible, but you need to format csv file properly as the attached sample file.

done

please send a temporary wp-admin login info to support@wpdownloadmanager.com, I’ll check that.

you need to change that from functions.php , find: $vars['similar_downloads'] = wpdm_similar_packages($vars, 5); , replace 5 with 3

custom social sharing add-on (free) for wpdm pro is coming soon.

try now

I’ve replied moments ago..

not clear, may you please explain little more.

please give me your url to check

solution is not secret, actually I need to check it in your installation to find the reason

please give me your url to check

not clear, free version never had multiple image preview, but in pro you can do that ( like: http://demo.wpdownloadmanager.com/wpdmpro/file-download/wordpress-shopping-cart-system/ ) . for that you have to use tag [gallery_WxH] with page or link template. That will show additional preview thumbnails in gallery format, each image height and width will be same as specified, eg:[gallery_50x30] will show image gallery of additional previews and each image size will be 50px × 40px