Go to: http://www.teamfdi.com/products/usb-icp/usb-icp.shtml and update the firmware in your USB-ICP device to at least v1.6. This fixes a
global erase bug.
Go to Options -> Advanced Options -> Security and uncheck "Protect ISP code".
In step 1 in the main window select your ICP interface.
In step 2 in the main window select "erase all flash".
Click on "Start".