Are you having a problem with Dreamweaver closing down (vanishing) as it starts to open new versions of WordPress?
Recent versions of WordPress have a new CSS file that is causing Dreamweaver no end of trouble. Attempting to load WordPress in Dreamweaver causes a partial load, then suddenly the load crashes and Dreamweaver vanishes from the screen. This is being caused by the recent change in WordPress to update the administration panel.
WordPress has added the CSS file /wp-includes/css/dashicons.min.css. This file is intended to add icons to the administration panel by using Font-face. Unfortunately this font face is enormous. The string incorporated in the font-face declaration is too large to be supported by Dreamweaver, causing Dreamweaver to crash.
Luckily, there is a solution to this problem. The solution is simple. If your version of Dreamweaver has the size limitation that causes crashes, simply delete the files /wp-includes/css/dashicons.min.css and /wp-includes/css/dashicons.css from your WordPress development environment. This will have little impact on your development.
Deleting the dashicons files from your development environment will have minor impact, but, probably none that bother your development. The deletion may cause the absence of font-face created icons in the administration area of your WordPress work environment, But, you will still see the alternate text associated with the icons. You can continue to work conveniently.
Warning: Remember as you load your work on your target website, you have deleted the dashicons files. Remember to include the dashicons files in your official release or your target site will have missing icons in the administration area.