Can't install DraftSight 2015 SP1

Hello

I recently changed my PC and tried to install DraftSight, but when i go to "http://www.3ds.com/products-services/draftsight-cad-software/free-download/" it downloads me the DraftSight 2015 SP2 version in which the free license option is not available. Does somone knows where i can download and install the free version?

Thanks in advance

Edit: running Windows 8.1 64bits