Are special dialogs with hints and tips about certain features of Comparator Fast.
You may read it and close the dialog, and if you don't want to see some dialog again, just check the "Don't show again" box before close the dialog.
Active Dialogs List
If you want to activate or deactivate some or all dialogs, go to Main Menu>Help, and use the "Introductions (Help Dialogs)" option. This shows a list of all available dialogs, the ones with a check mark are active. You may re-activate dialogs with just a check mark on proper dialog description (on list), or deactivate all.