Sorry guys I wish I could help. It's been years since I made that post, and hitting the arrows button has always worked for me. There are only two things I can think of that may help.
One is that someone above said they've tried hitting the button "100x times". But it is a toggle, meaning that it is either on or off, so you only need to press it once, then wait. It can take a few minutes to have an effect, so don't press it again or you'll be turning it off.
The other thing is that every time I get a notification to update drivepool, I click on it but it fails for some reason. I don't remember the exact error message and I've never cared enough to figure out why because it works just fine, but what I'm getting at is that I'm running an older version of it, version 2.2.5.1237. Perhaps this is a problem introduced in newer versions.
If it's neither of those things, then I can't think of anything else. I hope you figure it out.