Hi MJBook,
Thanks for your post. I can see why you’d want to turn Online Payments off. You can do this by going to Settings > Sales settings > Payments > Edit preferences, then deselecting Allow online invoice payments and saving the changes. This changes the default for new invoices. Existing invoices, recurring invoice templates, or invoices created through the Invoice app may still show the online payment option, so you’ll need to update those separately before sending. For the full steps, see Turning online payments on or off.
If needed, you can temporarily use Server Edition to work with offline backups.
Regards,
Sai