RTIR 5.0.10 is now available for general use.
Our documentation site has notes on upgrading and detailed release notes. When upgrading RTIR, you should also upgrade RT to version 5.0.10 for compatibility with this release and to get the security fixes and other improvements in RT 5.0.10.
Note that there was no RTIR 5.0.9 public release.
https://download.bestpractical.com/pub/rt/release/RT-IR-5.0.10.tar.gz
https://download.bestpractical.com/pub/rt/release/RT-IR-5.0.10.tar.gz.asc
SHA-256 sums
b99d35e5e7730ce1ac99719b995a5e6756993986b3f90b8748867a9e68fcbd55 RT-IR-5.0.10.tar.gz
327413d1eb75668d8894af8835f9f4c1a91d1cf3d574924034b07d7f74312699 RT-IR-5.0.10.tar.gz.asc
Enjoy!