Filtering with the *

How do I activate the filter function that pops up a search box when I press * (asterisk)

If you want the command so you can activate it in different ways, the command is:

Set QUICKFILTER

If you just want to change the hotkey, you can do that under Preferences / File Displays / FAYT and Filter Bar Keys.

Solved.
I must add it had nothing to do with Directory Opus.
I'm reinstalling Windows, which in all it's wisdom decided I need no NumPad.
So the * key simply didn't work.

(n this wasn't about the NumLock key)