I used to use the development suite to generate the .img file to load my CYUSB3014. I just found that the current version of the usb control center requires .iic to load the firmware. However, I could could not find the build option to generate the iic file. Therefore, I could not load my firmware anymore.
For CYUSB3014, You could generate IMG file(not .IIC file) using EZ-USB suite and download it into RAMEEPROM/FLASH etc.