Hi,
Yes.
The code change I gave before is to open the file in the browser instead of downloading it.
If you want it to be in a new tab, you need to change the line:
$files[] = '<a class="hikashop_product_file_link" href="' . $file->download_link . '">' . $file->file_name . '</a>';
to:
$files[] = '<a class="hikashop_product_file_link" target="_blank" href="' . $file->download_link . '">' . $file->file_name . '</a>';
in show_block_product_files.php via the menu Display>Views, supposing that you're also talking about the download links on the product details page.