No 2BrightSparks software automatically updates itself and it never has. We are occasionally contacted by users accusing us of automatically updating our software without their knowledge. We do not and never have. All updates and upgrades must be performed manually by the user.
SyncBack has an option to check for new versions, but that will only inform you if there is a new version. It does not download it nor does it install it.
If your version of 2BrightSparks software has been updated without your knowledge then it has been updated by a 3rd party system (e.g. winget) or by another user of your computer. Apps on Android (e.g. SyncBack Touch and SyncBack Monitor) may be auto-updated by the Google Play Store, but that is based on your Google Play Store configuration.