@Override
		public void actionPerformed(ActionEvent event) {
			String actionCommand = event.getActionCommand();

			// DIFF APPLY SETTINGS CHANGED
			// DIFFERENCES TO APPLY CHANGED
			if (DiffApplySettingsProvider.APPLY_FILTER_CHANGED_ACTION.equals(actionCommand)) {
				applyFilter = diffApplySettingsProvider.getApplyFilter();
				if (diffControl != null) {
					diffControl.setMergeFilter(applyFilter);
				}
				updatePgm2Enablement();
			}
		}
Reload the marked differences in the diff panel.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/ProgramDiffPlugin.java