See release notes at https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/release-notes/release-notes-0.5.2.md
Please verify the PGP signatures of the releases before using. They are signed with AdamISZ's pubkey (fingerprint: 2B6F C204 D9BF 332D 062B 461A 1410 01A1 AF77 F20B.
Notable: recent IRC connections will be solved by upgrading to this release - recreate a new joinmarket.cfg by moving your old one, then copy the new MESSAGING section to your old version and rename it back.
Also notable: this release includes the PayJoin feature, follow the links in the release notes linked above, for more information about it.