In my configuration, the URL: "http://dpbuildfarm/build/106.latest_finished" shows details on the latest completed build in my configuration #106.
However, this URL: "http://dpbuildfarm/download/106.latest_finished/artifacts/**" does *not* download the artifacts from that build; instead I get a 500 error, 'For input string: "106.latest_finished"'(log attached).
Likewise for latest, latest_successful, etc.

I tried to use the 3.x syntax "http://dpbuildfarm/download/106:latest_finished/artifacts/**" (colon instead of dot) and got a different 500 error, "The validated expression is false".