This is a major release of the generator. Important themes include:

1. Kotlin! New runtime for generating Kotlin code
2. Updated runtime for MyBatis Dynamic SQL
3. Removal of support for iBatis2
4. Update to Java 8

There are many other enhancements and fixes. Please read the release notes here for details: http://mybatis.org/generator/whatsNew.html

You can also see a list of other bug fixes and enhancements here: https://github.com/mybatis/generator/issues?q=milestone%3A1.4.0

The new artifacts are available in Maven central at

<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator</artifactId>
    <version>1.4.0</version>
</dependency>

and

<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.4.0</version>
</dependency>

You can install the eclipse feature from the eclipse market place here: https://marketplace.eclipse.org/content/mybatis-generator