The Proteus Professional demonstration is intended for prospective customers who wish to evaluate our professional level products. It differs from Proteus Lite in that it does not allow you to save, print or design your own microcontroller based designs (you can however write your own software programs to run on the existing sample design suite for evaluation), but does include all features offered by the professional system including netlist based PCB design with auto-placement, auto-routing and graph based simulation. - Please note using a Download Manager or Accelerator will corrupt the file.