@Override
	public ProjectLocator getLastOpenedProject() {
		String projectPath = Preferences.getProperty(LAST_OPENED_PROJECT, null, true);
		if (projectPath == null || projectPath.trim().length() == 0) {
			return null;
		}
		return getLocatorFromProjectPath(projectPath);
	}
Get the last opened (active) project.
@return project last opened by the user; returns NULL if a project
was never opened OR the last opened project is no longer valid
Ghidra/Framework/Project/src/main/java/ghidra/framework/project/DefaultProjectManager.java