Imperial units, typed values, Workshop and unlocked features now in the demo

DEMO UPDATE:

NEW
· Imperial units. Switch between metres and feet/inches in Options → Project → Units
(also in Settings from the main menu). Everything follows: sliders, dimension chains,
room areas, the measuring tape, and the PDF/DXF floor plans.
· Type exact values. Click the label of any slider row and type the number —
"2.60", "260cm" or "8' 6", "102"" in imperial mode.
· Q and E now move the camera up and down. While the furniture library is open they
still switch category.
· Sound button in the top right: mutes music and ambience in one click.
· Click sounds are half as loud by default.
· Tutorial: a guided run in an empty plot, from the first wall to a small furnished
house. Menu → Tutorial.THE DEMO NOW INCLUDES
· Import your own models (OBJ / GLB).
· First person walkthrough.
· Browse the Workshop to see what others are building.
Export (OBJ/PDF/DXF) and uploading stay in the full version.FIXED
· First person Reset now returns you to the point you saved at — and loading a save
puts you there too, instead of dropping you in front of the house.
· Save slots keep their preview image reliably.
· Storeys are called "Storey" everywhere. (Storey feature is still only for the full version).
· Controls list: no more duplicate or dead entries, and CTRL+SHIFT+Z is listed as
redo (it always worked).