Should I recalculate, and use mfp model or or tde model?

I have lost 20 lbs since 1/8/19, using the mfp model.
Age 63
Female
5 ft 5.5
sw 179,
goal 140.
I initially set to 2 lbs loss per week. Sedentary, and logged my exercise. Eating back some calories.
It worked!
Lately I’ve been eating more than my goal, due to dinners out and beginning of ice cream season, so weight loss has slowed. That’s ok. I can move forward.
My question is, should I recalculate/restart, and do mfp model( at .5 or 1 lb per week), or use bmr , tde model?
I calculated my bmr at 1375, and tde at 2012 at slightly active( using the info from sticky on this site).
The more I read and learn the more confused I get.
Thanks!