Upon the first launch of DraftSight after a new installation, you will be walked through an Activation Wizard. You will need your serial number and internet access to activate. In addition to an instant and automatic activation, you may also choose the manual email activation. Once DraftSight is up and running, you can also click on “Activate DraftSight…” under the Help menu to launch the Activation Wizard.

Please visit the DraftSight Community wiki page and DraftSight Activation post for more details:

https://r1132100503382-eu1-3dswym.3dexperience.3ds.com/#community:51/wiki:514