Hi Artur,
All available files are in the left panel>Information >“Files=>”. (See image)
Files are available for Part 2, Part 3, Part 4 and 5.
If you open any of these, you get a more and more complete model. With that model open, click in the Top View>>Files>Use as Render View. Now you can set up the Image size in the Render Settings and render out a fllorplan in the size and quality you like to have. I have attached one, with the size of the floorplan in 5000x3000cm, based on the buildings scale.
Perhaps place a cube with a Z=5000x3000 as scale, so it fits the floor-plan. The floorplan has its middle point on X=0 and Z=0.
All the best