Snapshots, safety backups before risky changes, and a return to a known-good state.

Snapshots

Waxlight can create instance snapshots — saved copies of an instance’s state you can return to after unsuccessful experiments with mods or settings. Snapshots are stored in the backups/ directory inside the launcher’s data folder.

Safety backups

Before potentially destructive changes to an instance, the launcher automatically creates a safety snapshot, so there is always a rollback point.

Last known good

The last-known-good mechanism records the configuration in which the game last launched successfully and can restore it after failures — for example, when an instance stops launching after mod updates.

Caution

Stop the game before backing up While the game is running, the account session data sits in clientsettings.json. A copy taken at that moment may capture it. Stop the game before creating backups and filesystem snapshots.

Export safety

Every feature that copies, exports, or archives an instance removes sessionkey, sessionsignature, playeruid, and playername from its clientsettings.json. This is a hard project rule — see Instance packages and Security.