What version of 505 Simulator do I need to use with PLC WorkShop?

Due to improved functionality recently added to PLC WorkShop, including support for the CTI 2500 Series of controllers, the latest versions of PLC WorkShop (versions 4.11 and up) require at least 505 Simulator version 2.01 to be able to load programs correctly. PLC WorkShop versions 4.10 and below are fully compatible with any version of 505 Simulator.