CSA uses a USB dongle as a system key called the “Hard-lock” to ensure only the legal owner of CSA can use the program. CSA cannot be executed without the Hardlock.
The CSA Hard-lock Identifier (a hand-tag) should be attached to the Hard-lock in order to identify its location and to prevent any unintentional loss. If you loss it, you may need to buy a completely new CSA license. The pictures of the Hard-locks as listed below show you where the Identifier can be attached to.