Put my PC back as it was

Where the backups are

• C:\ProgramData\AngAinOne — optim-snapshots (the state from before each tweak), powerplans (power plans exported as .pow), dlss-backups (the original DLSS DLLs of your games), driver-backup (exported GPU driver packages).
• %LocalAppData%\AngATV\AngAinOne — per_game_drs and game_registry_snapshots (original 3D settings and registry keys, per game), nvidia_defaults_backup.json (DRS settings from before any change), game-config-originals.json (original in-game configuration), dlss_swaps.json, amd_registry_origin.json and intel_registry_origin.json.
• %AppData%\AngAinOne — Snapshots (debloat, tweak and preset snapshots).
• Registry — HKLM\SOFTWARE\AngAinOne and HKCU\Software\AngAinOne: StartupBackup, UsbBackup, DnsBackup, DnsApplied, OptimMarkers.

How to roll back

There is no single button that undoes everything, and not every page knows how to undo: several restore item by item, and one — power plans — destroys instead of restoring (see the box below). Reinstall AngAinOne, then, depending on what you had applied:

• Tweaks — the "Restore catalog tweaks" button. It only covers the tweaks shown on that page.
• Appearance — three "Restore Windows defaults" buttons, one per section: File Explorer, Folders in This PC, Taskbar and Start. Each one only touches its own section, and nothing is written until you click "Apply". The "Interface & behavior" section has no button: its switches are turned back one by one.
• USB — no button restores USB. "Turn USB sleep back on" forces sleep on every controller: that is not a rollback, and on a controller whose manufacturer had turned it off, it is one more change. MSI mode and interrupt priority are undone by no button. Set them back controller by controller, on each controller’s card: the "MSI mode (latency)" switch, the "Turn off USB sleep" switch (unchecked = sleep allowed) and the "Interrupt priority" list. The values from before are in the registry, under HKLM\SOFTWARE\AngAinOne\UsbBackup — the app writes them there but never reads them back: it is up to you to use them as a reference.
• Startup, Network, DLSS — restoring is done item by item on the page (program, network interface, game): there is no global button.
• GPU drivers — the driver packages exported before a purge are files, in C:\ProgramData\AngAinOne\driver-backup: they are reinstalled from that folder, the app does not do it for you.