What happens if you click the small down-pointing arrow that is displayed at the top of the left edge of the Dialog, just below the title bar? It should expand the Dialog so you see the Property Manager tree on the left.
Then, if you find that you do not have any Properties in the file, you can use the Import button at the bottom to import Properties from other Archicad files or default Archicad Template files.
Get Archicad Tips at https://twitter.com/laszlonagy
AMD Ryzen 1700X CPU, 48 GB RAM, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), WIN10 PRO ENG, AC20-AC26
Loving Archicad since 1995