Hi,
for the MSFS2020 AIRAC updates you need a own client-app. The reason is, that the FMS Data Manager is a Win32-Application and not more “state of the art” - therefore we have decided to make a new one, a own App which is modern and easy to use.
Currently, this first try with the Navigraph Navdata client is a good start, with a limited functionality but we will continue the development of this app.
You can download the new app here - please read this FAQ carefully:
Whenever you have a question, don´t hesitate to contact us again …
Thank you & welcome at Navigraph
Richard