Version 5.0 causes warnings

Hello!

After updating to the newest version of Shortcoder (v5.0) I get in the back-end warning messages in the upper part of page:

…/plugins/shortcoder/admin/tools.php): failed to open stream: No such file or directory in …/plugins/shortcoder/shortcoder.php on line 43

Warning: include_once(): Failed opening '…/plugins/shortcoder/admin/tools.php' for inclusion (include_path='.:/opt/cpanel/ea-php70/root/usr/share/pear') in …/plugins/shortcoder/shortcoder.php on line 43

Warning: Cannot modify header information - headers already sent by (output started at …/plugins/shortcoder/shortcoder.php:43) in …/wp-includes/functions.php on line 6029

Warning: Cannot modify header information - headers already sent by (output started at …/plugins/shortcoder/shortcoder.php:43) in …/wp-admin/includes/misc.php on line 1252

Warning: Cannot modify header information - headers already sent by (output started at …/plugins/shortcoder/shortcoder.php:43) in …/wp-admin/admin-header.php on line 9

What to do?