Depending on the version, you should also have access to Regrind Subdirectories under Utilities. I think it came out in the late 5.2s or early 5.3s.
It tells you what version each dated sub is and regrinds them for you. It doesn't matter if they don't need a database upgrade. It also regrinds as far as I know.
If this is something you want to auto run once per week and you want it to automatically know what dates to run, I have some batch logic that grabs the current date and time and parses the month, date and year into separate variables. You may be able to use it to automatically determine the date and enter the command for you going back 7 days.