If you cannot install the PaperOffice release updates, first check whether your PaperOffice Plus is active.
If PaperOffice Plus is not active for you, you should activate PaperOffice Plus for each user account (s) to install the release updates.
How can I activate PaperOffice Plus later?
It's easy! In your PaperOffice interface click on the briefing symbol in the top menu bar.
Switch to the tab labeled "Program Status Help and Support".
In the PaperOffice Plus area you will see the activation button labeled "Activate PaperOffice Plus". Click this one.
You will be redirected to the shop.
Activate PaperOffice Plus for the specified user account and restart PaperOffice.
Done !