Inside the extracted YQArch folder, open the sys or system subfolder and run setup.exe as an Administrator . Add Support Paths:
Most tutorials skip this logic, but here's what actually works: yqarch autocad plugin install
This report details the standard installation procedure for yqarch in AutoCAD. Inside the extracted YQArch folder, open the sys
Step‑by‑step installation (general, Windows AutoCAD example) Assuming a typical installer is not available and you must perform a manual installation for a 64‑bit Windows AutoCAD release: Inside the extracted YQArch folder