“Rhino not found on this computer” although I have it. What can I do?

Rhino 5:
VisualARQ requires Rhino 5 SR11 or later version. You might be running an older version. You can update Rhino from here: http://www.rhino3d.com/download/rhino/5.0/sr
Then reinstall VisualARQ.

Rhino 6:
VisualARQ requires Rhino 6 SR11 or later version. You might be running an older version. You can update Rhino from here: https://www.rhino3d.com/download/rhino-for-windows/6/latest

Alternatively you can always check out in Rhino Tools > Options > Updates and Statistics if you have the latest version. Click on the “Check Now…” link to verify if you have the latest version or download the latest service release.
Then reinstall VisualARQ.