We have many different types of files in our project. The extensions for these files are below
Starting with version 2025R3:
Type File Type
Project File . dspkg
Workspace File . dspkg
Prior to version 2025R3:
Type File Type
Project File . dsproj
Workspace File . dswksp
Templates
App Settings Template . dss
Workspace Settings Template . dss
Rebar Tables . drt
Formwork Dimensions . dft
The application will not work with any other file type extensions.
Prioer to version 2025R3:
Newly created product project files and workspace files follow the nomeclature as listed in the table below. The <Project File> and <Workspace File> are as described above under File Type column.
| Product Name | Project File Type Extension | Workspace File Type Extension |
| Foundation3D | .F3D.<Project File> | .F3D.<Workspace File> |
| Mat3D | .M3D.<Project File> | .M3D.<Workspace File> |
| Shaft3D | .S3D.<Project File> | .S3D.<Workspace File> |
| ds-Tank3D | .T3D.<Project File> | .T3D.<Workspace File> |
Starting with version 2025R3,
While the dspkg files may have extensions such as F3D, M3D, S3D, to easily let the user identify which products do these belong to, these extensions are not necessary to open them in dsAppManager. dsPkg files without these extensions will easily open in the appropriate product in dsAppManager.