Ted on 64-bit Windows
Your current version of Ted does not work on 64-bit editions of Windows (XP, Vista & 7).
This website describes the replacement version that does work on 32-bit and 64-bit editions of Windows.
This new version works and installs quite differently to the Ted software so we will need to go through an upgrade process.
Please refer to Upgrading from Ted for an overview of the upgrade process.