XR15 Remote 15 second rewind stopped working

Hi all,

A long time ago I reprogrammed my remote for the page down and up buttons to be, I think, 15 seconds instead of 5 minutes. Randomly today they reverted to 5 minutes and the previous fix of "exit-exit-exit 0030" no longer works. Anybody know how else to change it? This is a personal disaster to me lol