check "always in tray" in the options (under miscellaneous) to get rid of the task bar entry.
Then it'll be in the TaskBar instead, right?
No, with 'Always in tray' checked, XMPlay will always have a tray icon, rather than a task bar button. It's not possible to hide the XMPlay icon, otherwise you wouldn't be able to restore XMPlay

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But I can restore it with the "Button Command 3 (= Minimize to tray/restore)" in the "XMPlay Tray Icons Utility" with the icon it added to the tray, so I don't need the xmplay icon at all anymore anywhere

But now I put it into the "hidden icons" section of the tray, so it doesn't show up in the first view anymore.