Completely broken/Upgrade errors

I’m not on a multisite setup, but I get the following when the plugin is updated to 5.0.0.

Warning: fopen(/home/XXXXXXXX/public_html/magazine/wp-content/plugins/breadcrumb-navxt/breadcrumb_navxt_admin.php): failed to open stream: No such file or directory in /home/XXXXXXXX/public_html/magazine/wp-includes/functions.php on line 3677

Warning: fread() expects parameter 1 to be resource, boolean given in /home/XXXXXXXX/public_html/magazine/wp-includes/functions.php on line 3680

Warning: fclose() expects parameter 1 to be resource, boolean given in /home/XXXXXXXX/public_html/magazine/wp-includes/functions.php on line 3683

If you try to remove (delete) the plugin, you get an even more complicated error without any way out of it, except to FTP in and remove the plugin manually.

Is there any fix in the works? It’s destroying your excellent reputation.

http://wordpress.org/plugins/breadcrumb-navxt/