Add to Cart button has changed to Pre Order label

We are having an issue with our store that is badly affecting conversions. The add to cart button has it’s label replaced with “Pre-Order”. We previously had an app that offered this feature but this has been deleted a long time ago. Can you please advise what might be causing this. Image showing the button - https://prnt.sc/Nitq7aiW4050

@cyclists-com It’s hard to say without checking the backend coding. You may share the login information to the private note section.

Thank you