Don’t risk your PC for a ghost. Here are three professional ways to get that T-Spline workflow back.
If you previously purchased T-Splines v40r11183 and lost the installer, you should: tsplines v40r11183 download patched
No legitimate source offers a “patched” download. The only public download archives (e.g., from Food4Rhino old mirrors) contain the trial version which requires a valid serial number. Don’t risk your PC for a ghost
T-Splines was revolutionary. It bridged the gap between the freeform ease of Subdivision Surface modeling (like Maya or 3ds Max) and the engineering precision of NURBS (like Rhino or SolidWorks). Version 4.0 (build r11183) was one of the final releases before Autodesk acquired the technology in 2014. No legitimate source offers a “patched” download
After the acquisition, Autodesk killed the standalone plugin and folded the technology into Autodesk Fusion 360 (as the “TS Splines” environment, now called “Form” modeling). The original T-Splines for Rhino was discontinued, abandoned, and is now considered abandonware.