You should not need to go through the probate again.   You remain the executrix of the estate until you are discharged by the court at the closing of the estate.  What goes "stale" are the Letters Testamentary which are the certificates that are issued by the court that show that you are still the fiduciary of the estate and can make decisions on legal matters.  The reason that they need to be current is really to make sure that you were not removed or stepped down, etc.  It is a way for the financial institution or whomever you are dealing with to cover themselves.  All you have to do is go to the probate court and ask them to re-issue the Letters and pay the fee oer copy.  This will certify that you are still in charge.  That's all.  Good luck.