Native file format .BLD used in TurboFloorPlan legacy software (based on Cadsoft program) up to version 16 ought to be converted to DXF or DWG file format in order to imported into project of more recent TurboFloorPlan build (based on IMSI Design program) 17, 2015, 2016, 2017, 2019.

Have earlier version of TurboFloorPlan (14, 15, 16, Design your Dream Home) installed on the same computer where TurboFloorPlan 2017 is installed to open and convert the necessary projects in accessible format and then to import for further editing. The CAD lines convert into walls, decks, etc.