Hi,
figured out the same problem with the navigraph database for the Carenado Phenom 300.
The Carenado user helpdesk did not understand my problem, as well.
However, I found a solution.
On my system everything works fine, if I login and start the FSX as administrator. The navigraph database will be installed immediately (less than 2 sec.) and I can use the FMS of the Phenom 300.