Closing Dirac Live sometimes left a process running.
Update help texts.
Fix issues with loading some older projects.
Fix a problem that would make it impossible to save the project in some situations.
Windows: https://artifacts.connect.dirac.com/public/accord/release/win64/diraclive-v3.3.1-setup.exe
macOS: https://artifacts.connect.dirac.com/public/accord/release/macOS/diraclive-v3.3.1-setup.zip