Even though openHAB 4 is now out, we are still taking care of our openHAB 3.4 users - we just created a patch release with a few updates to make openHAB 3.4 continue to run smoothly. A few cloud APIs had changed, which made adaptions to our bindings necessary. Please check out the release notes of openHAB 3.4.5 on GitHub!
We recommend the update to all 3.4 users (even if you do not use any of the listed bindings), since it also prevents an issue with newer JDK 11 builds.
Since the 3.4 downloads are not anymore prominently on our download page, you can easily find the binaries under “Assets” at the bottom of the GitHub release notes page.