I am eventually going to "relaunch" my online station (currently running a reduced schedule of recorded shows sourced from different software) with Airtime; having re-installed the lot from the newest version.
Apparently my version is now 2.5.1.a but other posts on here refer to 2.5.1.2 and 2.5.1.3.
Airtime-check-system says 2.5.1. If I run apt-get update there are no messages about newer versions.
I did notice the web interface is https rather than http.