Good news! The latest 1.5 update is available also on GOG!
You can find the announcement with the changelog here:
https://steamcommunity.com/games/736820/announcements/detail/6609651198406606004?snr=2_9_100015_ Changelog:
Update Overview This is the fourth major update since the release of Knights of Honor II: Sovereign. This version adds new unification quests for many kingdoms along with an improved UI to show the quest’s status. A new setting allows players to place up to 18 buildings in a single province, which not only increases the importance of smaller kingdoms with few provinces, but also introduces more gameplay styles and tactics.
The game’s AI also got a makeover, especially the economic decisions, army recruitment and kingdom stability have been improved, making the challenge more interesting and fun.
General • Almost all kingdoms now have a unification quest
• Added new icons to show rebellion risk for provinces
• Changed rebellion triggers to be more predictable
• Rebellious population now depends on the population size of a province
• Buildings can now be reorganized via drag and drop
• The maximum amount of buildings slots in a province can now be set at game start
• Added several indicators and messages for pause and game speed in multiplayer
AI • AI in general is now more stable and makes it harder for the player to "snowball" in late game
• Improved AI decisions when choosing a governor for a province
• AI now focuses province development of governed provinces
• AI takes more things into consideration when developing a province, like the cost of upgrades, province specialization, realm's needs, and more
• AI now spends more of its budget surplus for armies
• AI kingdoms now hire more knights and always try to govern all their provinces
• AI now tries hard to keep their kingdom stable and chooses skills and traditions accordingly
• Increased AI’s focus on book production
Miscellaneous • Decreased the chance for vassals to become “Emperor of the World”
• Added new UI elements to show unification quest progress