To be able to export from Geometra, you must first create a calculation or open an existing one in eKalkyl.
To create a new calculation in eKalkyl, do so by right-clicking on the folder at the top right and selecting "New project"
Then name your project.
Then go back to Geometra and select all the objects in the tree that you want to export.
Then press the "export" button at the bottom left.
After you press export, the program will ask you if you want to upload the file to the server, here you select "Yes" to bring the drawing over to ekalkyl.