Firefox Portable 13.0 with DMR

have always used DMR (DropMyRights) to start
Firefox Portable, never any problems

now once the upgrade to 13.0 has been made,
the program will not run, get the message,

"Your Firefox profile cannot be loaded.
It may be missing or inaccessible."

re-install 12.0 and everything works fine

any insight into this is appreciated