Match Simbrief to MFSF20

[Chaezaa]

Quote from Simbrief:

Navigraph subscribers always have access to the latest navigational data on SimBrief, while those without a subscription can freely use the default data cycle (which is slightly dated).

There is no way to get the latest AIRAC for SimBrief without paying money. Another point is that Navigraph does release the latest AIRAC very quick while MSFS has a delayed update. Navigraph user can use their navdata for MSFS and be independent from the incomplete stock MSFS data.