Changes to presets

I am puzzled and a bit worried. I use WLED to control my Christmas lights. I’ve had them for 2 Christmases now. I set up three different presets for display during Christmas. I changed them manually. The installer bailed on me so I’ve learned on my own. This year I had hoped to try to set them for display on a schedule but needed to train myself on that function. The other day they just came on. I looked at the configuration and the three presets had been configured to start after thanksgiving till the end of the year and different preset on different days of the week.
Someone has changed these and I don’t know when or by whom.
Is there security on this system and how do you implement it?

There is a rudimentary “Settings Pin” under Config->Security & Updates.

The emphasis is definitely on rudimentary…