Hi Patrizia,
If we understand you correctly, you want to remove shortcodes from the PDF document.
Please complete the following steps:
1) Go to the plugin settings page, “Custom Code” tab;
2) Find “bws-custom-code.php” edit field;
3) Mark “Activate” checkbox;
4) Insert the line add_filter( 'bwsplgns_get_pdf_print_content', 'strip_shortcodes' ); into this field;
5) Save changes.
http://prntscr.com/cnbvyc
Please note that strip_shortcodes() function removes only registered shortcodes using add_shortcode() function.
Sincerely,
BestWebSoft Support Team