The application is compliant with Windows XP/Vista/Windows 7/Windows 8 in both 32 or 64 bit version.
Please check System Requirement to ensure your system is suitable for running SR 3D Builder

Download and run the above setup program to install the whole application with full part library, images and
connections addendum. Read the history for a list of changes

IMPORTANT NOTICE: you are no longer allowed to use the software for
commercial scopes without registering it

Allow you to download and install a small package including only latest application and file changes
excluding part library and images updates.
No fix are currently available
Instructions: To install the fix, simply extract the contents of the archive in your application installation
folder (usually %Program Files%\SR3DBuilder) overwriting any existing file.

No additional Parts Patches are currently available
This package only contains all latest available patches for parts connection. It is highly recommended you
clean the c:\lDraw\Conns folder before adding this package
Instructions: To install part patches, extract archive contents in c:\lDraw folder overwriting any existing file.
If anybody of you patch and test any new parts, please send me so I can share them with the community.
Thanks to anybody will help me.

If the application crash while starting, this means that you NEED to update your Microsoft DirectX

Regardless the DirectX version you have installed on your system (DirectX 9.x, 10.x, 11.x),
follow this Microsoft official link to perform the update (choose the correct language for your operating

The debug version of the application is no longer available.
The addictional features are now integrated in the standard application version.
Here is the unchanged relative documentation.