A new Toolbox 1.10 beta 5 is available for download.
It adds an "Erase" button to the "Program Flash" dialog, allowing you to erase your whole NAND-flash memory, while retaining your invalid block information. This may be useful to those who have problems storing data on their internal memory unit and who therefore want to "remove" it.
After the NAND-flash has been completely erased, at least the "system" partition needs to be reprogrammed with the "Program Flash Memory" option.