Sure. In order.
Update options. Open Settings Cmd/Ctrl+Shift+,, then in the search bar at the top type Update: Mode. You’ll see a dropdown:
default/startchecks and updates automaticallysilentlyApplyOnQuitupdates on quitmanualonly updates manuallynonefully disables updates
Right next to it, search for Update: Release Track and pick stable or prerelease.
About launching into the Agents Window instead of the IDE. You can set this in Settings > General > Startup > Window Restoration, then choose Last Used Windows. After that, close Cursor while you’re in the IDE window. Next time you open it, it should open the IDE instead of the Agents Window. This is what you meant by based on history, it restores your last session. Also, opening a folder will always open the editor.
If the setting doesn’t stick, update Cursor to the latest version. They fixed a few things around this behavior. Related threads if you want to read more: Can I have open ide by default back? and Remember IDE layout on reopen — don't default to Agent-only view
Let me know if you can’t find any of this or if it doesn’t work.