I am running into the same problem.  I adjusted a memorized group to go on Sept 1, 2018 but it still comes up on startup as wanting to enter the group on August 1st.  How do I remove the prompt at start up.   And yes, I did try to change the memorized transaction to enter manually but that didn't change the prompt at startup .  It seems that once the transaction is set to go there's no stopping it...I really don't want to say yes to the prompt and then remove each transaction that it created from the books.  There must be another way to remove the prompt.