New Features/Enhancements

CorsixTH is now available as a Flatpak! (thanks to @rmnvgr !)
On MacOS DMG files are now supported as disk images for Theme Hospital data
Hospital policies will now carry over to your next level in the campaign
You can now remove destroyed rooms for a fee (config option)
The information dialogs that appear when a room is first built can be disabled in the configuration file
Fire extinguishers in rooms now have a chance to save a smoking machine from exploding
Advisor has more advice
Additional trophy of the original game is implemented
Windows and room size now impact staff happiness
Roujin's challenge cheat is back
Experimental direct_zoom config option, for more efficient zoom. Fixes zoom on some hardware. Defaults off.

Changes

Emergencies with unknown diseases will no longer occur
The VIP system has been overhauled to provide more balanced ratings
Overpriced/Underpriced treatments now scale with difficulty
Placing a receptionist on a desk will now call her to the desk
Boiler breakdowns now depend on handymen
Faxes can no longer be opened while paused (unless editing while paused is enabled)
Improvements to receptionist announcement frequency and behaviour
The game will now check common locations for Theme Hospital on startup if it has not been configured
Games compiled without movie/audio can no longer access these settings
Update check now occurs over TLS for better security
English names are now shown in a tooltip when hovering over a language option
Improved TTF font rendering