However, simplorer consumes a lot of system resource, especially simulating Switching circuit. When the simulator uses up system physical memory, the PC gets trouble to run smoothly. It is nearly impossible to switch between windows tasks since the computer behaves like a stone at this situation. So the solution is :1) equip your system with crazy large memory; 2) avoid multi-task operation during simulation.
While for SaberDesigner, you can change memory usage mode. Although the system will slow down when the memory usage is more the the system phisical memory, it is much better than Simplorer.