BSL Mass Erase on MSP432 using BSL_Scripter

Hello,

I have couple questions regarding the BSL and BSL_Scripter...

I'm performing a MASS_ERASE on the TI Launchpad Dev Kit using the BSL_Scripter.exe program furnished by TI.  All's well as shown here:

I then use the Elprotronics tool to verify and notice the Flash Boot-Override Mailbox is not erased.  Is there something I need to do when I setup my BOM (Boot Override Mailbox) or is this just a limitation of the BSL_Scripter and using the MASS_ERASE command?

Here is a diagram from the Elprotronics tool.  Notice the address starting at 0x0020000 has data:

Thanks,

-Jim