The correct location is the Exec folder within your main ArtCAM Pro 8.1 installation directory (e.g., C:\Program Files (x86)\ArtCAMPro8.1\Exec ).
Download the latest Sentinel HASP LDK Runtime from the official Thales (formerly SafeNet) website. Uninstall any old drivers first. Install the new runtime and restart your computer. 3. Manual DLL Registration artcam pro 81 acqdll work