Navigate to and delete any remaining folders related to the software, especially those from the SolidSQUAD activation. Common locations include:

FreeCAD CAM workbench or Blender (with manufacturing plugins). For Simulation/FEA: OpenFOAM or SimScale (community tiers).

If you can tell me you are trying to install and if you upgraded from Windows 10 , I might be able to offer more specific troubleshooting steps.

If the license server failed to start during boot, you must force it to run manually. Press Win + R , type services.msc , and press .

If the installer is blocked by old data, a manual cleanup may be necessary.

Press Windows Key + R , type regedit , and click OK to open the Windows Registry Editor . Navigate to the following directory pathways: HKEY_CURRENT_USER\Software\ HKEY_LOCAL_MACHINE\SOFTWARE\