Hey, this is a known change. The Agent/Editor/Zen tabs in the top bar were removed in recent updates. They’ve been replaced with custom layouts.
From your screenshot, it looks like you don’t have the gear icon in the top-right corner. That’s weird, it should be there to manage layout presets.
For now, use keyboard shortcuts to switch:
Ctrl+Eto quickly switch to the Editor layoutCtrl+Alt+Tabto cycle through layouts. If that doesn’t work, go to Keyboard Shortcuts, findView: Switch Layout, and set your own shortcut
More details about the new layout system:
A similar issue was discussed here: