Ai, which is not always accurate, offers these suggestions. Worth a try...
"Unfortunately, there is no direct way to remove the 'Update Express Accounts' tick box from the payment screen in NCH Express Invoice. This option is a built-in feature of the software that allows for integration between Express Invoice and Express Accounts
. The checkbox is designed to give users the flexibility to update account information in Express Accounts software when processing payments.
If you're not using Express Accounts or don't need this functionality, you can simply leave the box unchecked when processing payments. The software will still allow you to record payments without updating Express Accounts.
If this feature is causing inconvenience, you may want to consider:
Contacting NCH Software support for a possible customization option or to provide feedback about removing or hiding the option in future updates..
https://tinyurl.com/y2z48ycj
Remember that while you can't remove the checkbox, you can ignore it if you don't use Express Accounts, and it won't affect your payment processing in Express Invoice."