qBittorrent v4.3.3 was released.
Support for macOS 10.13 (High Sierra) was dropped because Xcode doesn't support C++17 for that version.
For the same reason it is highly likely that support for Ubuntu 18.04 (Bionic Beaver) will be dropped in the next releases.

v4.3.3 changelog:

• FEATURE: New languages: Azerbaijani, Estonian
• BUGFIX: Unify global speed dialogs for normal/alternative speeds (thalieht)
• BUGFIX: Increase maximum global speed limits ~2 GiB/s (thalieht)
• BUGFIX: Save fastresume when setting torrent speed limits (thalieht)
• BUGFIX: Group several torrent options into one dialog (thalieht)
• BUGFIX: Capitalize locale names (Chocobo1)
• BUGFIX: Improve content file/folder names handling (glassez)
• BUGFIX: Drop notification about move storage finished or failed (glassez)
• BUGFIX: Reload "missing files" torrent instead of re-checking (glassez)
• BUGFIX: Remember dialog sizes (Chocobo1)
• BUGFIX: Improve detection of file extension string (Chocobo1)
• WEBUI: Don't call non-existent elements (glassez)
• WEBUI: Update "Keep top-level folder" in WebUI options (thalieht)
• MACOS: QMake: Raise minimal macOS target version to 10.14 (glassez)
• LINUX: Use legacy 'data' directory only as a fallback (lbilli)
• OTHER: Bump project requirement to C++17 (Chocobo1)