See release notes at https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/release-notes/release-notes-0.3.4.md
Added 18-7-18 : Binary version of Joinmarket-Qt, with signature, for those who don't want to bother with running scripts; reminder (if you hadn't seen this before, it runs Taker-side functionality (doing coinjoins, or tumbler runs) in a Qt GUI). Please verify the signature against the key in this repository! (here).
Makers must update - there are at least two bugs fixed here which can lead to your bot failing to function (even if they are unlikely). Pay attention also to offer fees - the default has changed.
Takers are strongly advised to update as soon as is practical, since there are fixes that help the completion rate of joins to improve, in some cases significantly.
But do read the notes, also ...