• Fix Copy & Paste
• Allow setting QoS for subscriptions
• Show Meassge ID (for QoS > 0)
• Improve JSON editor
• Allow multiple connections to the same broker from MQTT Explorer (random client ids)
• Remove recursive topic removal limit
• Retain focus on publish input fields when publishing
• Fix editor layout issue
• Fix password input
• Fix charts where json properties contain periods
• Fix publish sidebar width
• Fix plot range selection
• Update Electron

A downgrade to a version prior to 0.4.0 is due to a new configuration format not possible.