I have turned on the option for “Numbered Backup” but when I press Ctrl+S I just get the typical question “ Overwrite or Cancel?”

There is Backup folder created (autosave is off) in the HIP directory but no extra file when I save.

How can I evoke a “Numbered Backup”?

Or is there a shortcut for this?

Ctrl-S creates a numbered backup on save if ‘make numbered backup’ is enabled.

I had the “Numbered Backup” checked and it didn't work.
I switch back to “ Overwrite File” closed program and went to sleep.
Woke up, saw the reply, switched again to “Numbered Backup” and now it works as expected.
Strange…
Thank you jsmack, your answer made me try again,so now I can save without the $HIP changing the cache directories!