
Show sales in the last selected day option have 31 days limit. You can change this limit following the next steps:
Increasing the day's limit can harm the website's performance. We recommend doing that only on powerful servers.
- 
Navigate to your server WordPress installation and go to wp-content > themes > your-child-theme If you need to learn about child themes you can visit the WordPress Codex 
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Search the functions.php file. 
- 
Open the file with your text editor program. 
We recommend doing a file backup before any editing.
- Add the following code.
add_filter( 'atum/get_option/sales_last_ndays', function() {
  return 50; // Add the desired number of days here
});