As long as you can verify ownership (name and email used at purchase), the support team will resend your key. Do not pay for "license recovery" services – they are scams.
You get direct help from the developers if something goes wrong. proficad license key
Here is the technical reason why.
unlocks the full suite of automated features required for commercial electrical engineering and technical documentation. Core Licensing Breakdown Home Edition (Freeware): As long as you can verify ownership (name