Playguide and duty Roulette

[Niwashi]

The recommendations window can be configured to show whenever you change regions, once when you log in, or never (except for when you manually select it). It's in Character Configuration somewhere, I think in UI Settings -> General tab.

As for the Duty Finder, I've never seen it pop up for any reason other than when I was waiting in queue and it's now found a party and it's time for me to start the duty. I'm not sure why it would keep popping up repeatedly. Was somebody repeatedly joining then withdrawing from the duty? (I think there's a limit to how much you can do that before getting penalties for it.)

You can turn off tutorials (the Active Help popups) if you want to, but it's really only in the first 15 levels or so that those pop up a lot. Thereafter, you'll still see an occasional one, but since they only come up the first time you encounter a new feature of the game, they're not going to keep aggravating you throughout it. (And they can sometimes be pretty useful.)