Navdata center buttons greyed out

I am trying to update for the newest AIRAC but when I load the Navigraph Navdata Center all the buttons are greyed out and there is no response if I try to click on them.

Hi…,

Welcome

Please disable Antivirus and any Firewall, uninstall, redownload and install Navigraph Navdata Center. Please restart machine.

Any improvement?

Cheers
Ian

This was happening to me consistently. Running the Navdata Center as administrator fixed the problem.