Bug fix on top of v1.2.2 — same panels, same features, one problem fixed.
Tracks with no artist tag (title displayed correctly, but the panel stuck on "Searching djay's database…" forever). Two separate bugs: the app required an artist before even attempting a lookup, and — after fixing that — a leftover staleness check was silently discarding the (successful) result anyway. Both fixed. If a track shows its title fine but never calibrates, this was very likely why.
See the v1.2.2 release notes for what's new since v1.2.0.