First, go to the Imports(1) tab which is located on the left menu.
Then, either drag and drop your statement file into the box at (2) or click the "Click here" button to choose the statement file through the explorer.
Finally, click the "Upload File"(3) button to start the import process.
The import is now starting as indicated by the active import message at the top (1).
In the table below you see the currently active imports (2).
The import may take a few minutes. Please do not re-upload the same statement twice.