Exactly as the post title states - this is the same issue as discussed 4 years ago in this thread.
https://community.quicken.com/discussion/7886285/one-step-update-doesnt-remember-selected-accounts
I go into one step update, select the desired accounts, click "apply" which is supposed to save the desired accounts, then update. Next time I try none of my desired accounts have been saved.
I've performed the validate and super-validate exactly as discussed in the earlier thread to no avail.
Quicken Classic Deluxe
R65.17
Build 27.1.65.17