There it is, a new patch. 
If you are using the Itch Desktop app, the download should happen automatically. If not you can check for a new update.
Or you can manually download the new version.
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Changelog V2.14 Patch F
CHANGE: After the production of Comfort and Table Seats ends, as long as your airliner uses these, you can still use them to create a new seatmap.
CHANGE: You can now schedule fligths for the current season if you already have flights on the same airliner at the same time for the next season.
FIX: When viewing a seatmap with Comfort or Table Seats selected for a class, after the production of these seats ended, will now show these seats as the selected seats.
FIX: Saving games with advertisments works again.
FIX: Calculating the filling degrees now works properly before the introduction of on board wifi.
If you are using the Itch Desktop app, the download should happen automatically. If not you can check for a new update.
Or you can manually download the new version.
--
Changelog V2.14 Patch F
CHANGE: After the production of Comfort and Table Seats ends, as long as your airliner uses these, you can still use them to create a new seatmap.
CHANGE: You can now schedule fligths for the current season if you already have flights on the same airliner at the same time for the next season.
FIX: When viewing a seatmap with Comfort or Table Seats selected for a class, after the production of these seats ended, will now show these seats as the selected seats.
FIX: Saving games with advertisments works again.
FIX: Calculating the filling degrees now works properly before the introduction of on board wifi.
