So apparently to delete the "secure" files, you need a token when calling sl_FsDel(...)
You get that token when the file is originally created and stored.
What then...? Are you supposed to write it down some place? Because you MUST to have the master token to delete the file. And in an embedded environment, it's not really practical to store that token "on disk".
You can't get that token from the sl_FsGetInfo(...) call
So, there is no practical way to "decommission" a unit? If my customer wanted to sell off a device with the NWP inside, or return it for service, and felt it was necessary to remove such confidential information, they can't do it?
Did no one think this through?