Summarized changelog:

• Enhanced track designer with ability to add/remove scenery and footpaths.
• Landscape doors for the Ghost Train.
• Add on-ride photo section to Air Powered Vertical and Reverse Freefall Coaster.
• Allow extraction of GOG installer via innoextract.
• Add pause button to the Track Designer.
• Add terrain surfaces from RollerCoaster Tycoon 1.
• Make ride construction shortcuts work for footpath, too.

Full changelog here.

1. Reinstalled the assets from GOG installer using built-in option to automatically extract the files.
2. Loaded my save and continued playing.