In this file selector dialog you must point to the cacert2012.p7b certificate file.
- Select the desktop icon on the left (1)
- Locate the "certyfikat" folder in the main part of this window, and double-click it to place it in top bar (2)
- Select "All files" from the drop down list (3)
- Select the cacert2012 file (4)
- Press the "Open" button (5)