Hi, here is a brief explanation.
PDF24 is installed:
I open PDF Redact, create a black square in a .pdf file and save it. Then I open that .pdf file with lets say LibreOffice Draw. Now I am able to move and remove that black square and see the information behind it.
I am using PDF24 online in a browser:
Now the same black square cannot be moved or removed in any program.
I would love to use the offline (installed version) for peace of my mind. Can you please fix it?