TT Home is the offical place for updates.
If you don't want the old official Navcores you can seek the Navcore section and try one of the v9 Navcores.
The 910 maps are out, so you only need to check the map chart to select a suitable map for your Navcore.
Use FastActivate for the rest.
If you read the instructions in the corresponding threads you should have little to none problems.