As far as I know, Shane doesn't have it bundled and it has to be physically downloaded/installed, but it should appear in Programs and Features as it does in mine.
You haven't said which version of Windows you are using, but in Win 7 - Start - All Programs is there a folder named Tweaking.com that you can expand to see if it's in there.
If it is, right click on it and select Properties and it will give its install date and if your restore points go back that far, then use one to before that date, but Scan for affected programs first so you will know if you have to reinstall anything afterwards.