• Support PMD 7 (in addition to PMD 6)
• Changed default PMD options to -f text -R rulesets/java/quickstart.xml. Note: You might need to adjust this,
  if migrating from PMD 6 to PMD 7. The new default options work with both versions.
• Fixed #7: PMD distribution changed the name of the entry point script from run.sh to pmd

• Updated minimum required Java Version to Java 11.
• The bluej extension now works with BlueJ 5.0.0
• Fixed #4: Support BlueJ 5

• Fixed #1: no PMD item in context menu on BlueJ 4.0.1 on a Mac
• Fixed #2: BlueJ Won't Start
• Updated minimum required Java Version to Java 1.7.
• The bluej extension now works with BlueJ 4.1.2

• The extension detects the operating system (Windows vs. Linux) and
  handles both. So, from now on, there is only one jar file.
• There is no extra shell script needed anymore.
• The "Path to PMD Installation" and the "PMD Options" can be configured
  now.

Installation

• Make sure, you have PMD installed. It is not anymore included with this extension.
• Copy the file PMDExecExt.jar to BlueJ's extension directory.
• Make sure, you have the "Path to PMD Installation" configured in BlueJ.

See https://github.com/pmd/pmd-bluej/blob/2.1/README.md for more information.