oh its you again, i already told you how to fix ghostscript errors. Unless you are trying to decrypt a newer PDF this application will work fine (up to 1.6 i think)
If you need newer, use something like Advanced PDF Password Recovery 5 (not freeware)
there are many others.
I also told you before, they may not update the firmware, so the only other e-ink with this size that has what you want available is the entourage, so get that or deal with the DX