PDF Architect 4 - unwanted notification sound

When I try to close a document, it beeps loudly... I can't remember setting any sound at all, how can I stop ALL sounds for that program?

Hi @axeldancoisne

It's probably that Windows Sound reminding you to confirm your edit?

You can deactivate all sounds from PDF Architect in the Windows Volume mixer:
(Right-Click the speaker icon on the right side of your Windows task bar to open it.)