Open the (search for it in the Start menu under "Labcenter Electronics").
refers to the license tier. Proteus comes in various editions (Lite, Personal, Professional, and Enterprise). The Professional edition unlocks advanced simulation models, larger board sizes, and multi-sheet schematics. Open the (search for it in the Start
:Locate your license file (usually a .lxk extension). Run the Proteus License Manager as an administrator, click Browse for Keys , select your file, and click Install . larger board sizes