Update 15:

Official Map Extension DLC achievements added.
Fixed that some base game achievements required the player to own the Official Map Extension
Made collectibles always spawn, even if the player has already found them.
Found and rescued the married couple trophy
Fixes and performance improvements to NPC buses (also improves performance during national holidays)
Improve multiplayer initial synchronization bandwidth usage
The cashier setting for co-op missions is now working again
Fixed several bus and route unlocking issues in multiplayer
Several fixes for the bus customization menu
Fix that some settings were not saved.
Improved looks and LODs of the NPC Cars
Several UI focus improvements and fixes
Voicechat now instantly gets applied after changing the checkbox value
Fixed Wheelchair passenger AI so they always only take the door with the Ramp
Fixed some bus selection issues, most important that the rental bus was not automatically selected
Improved input device switching
Fix custom license plates for bus models that had issues with them
Fixed Iveco Driver Door Material for the bottom left corner (Was Floor texture)
Normal buses no longer count towards bendy bus objective in the Student Exchange mission
Fixed airport stop direction being reversible causing the route to become invalid
Several smaller bugfixes and game improvements