: For Windows users, you might also need to disable Windows Defender or any other security software.

Back at his desk, the cracked Topograph refused to quit. Its overlays began to stitch themselves to modern tiles, like a patient seamstress sewing old cloth into new. A small dialog blinked: THANK YOU FOR INSTALLING. PLEASE REPORT ANY ANOMALIES. It was a relic, yes, but not a defunct one; someone — or something — still tended it.

Install QGIS + the plugin “COGO Tools” or “Surveying Tools”. You can import points from CSV, compute traverses, generate contours, and export to DXF – all without paying a cent or risking malware.