Version 3.4.0 (May 2015)
- Textual editor
  - Improved robustness and memory usage
  - Highlighting of matching brackets
  - Preference to enable/disable auto-completion of brackets
  - Dialog about switching to the POOSL Edit perspective when opening a POOSL file
  - Reduced the number of follow-up errors shown by the model validator
  - Model transformations can be applied to multiple files at once
  - Built-in help extended with syntax
- Debugging framework
  - Improved robustness and memory usage
  - Dealing with special characters
  - Dealing with projects containing multiple files with the same name
  - Repaired some of the basic method declarations
  - Debug view shows the hierarchical instance structure
  - Remove highlighted lines at terminate and resume
  - Solved connection problems when starting a debug session on a Mac