Reset start date

It seems that I have downloaded the app and created an account 50 weeks ago, but I have used the app and done the workouts less than two weeks (5 workouts so far). However, the AI seems to think that I have been training for almost a year on the program, and it keeps adjusting my caloric intake etc based on that and comparing my progress I have made in two weeks to the progress I should have done in a year.

Now that does not confuse me much, as I know where I stand, but it still would be nice to be able to reset the start date. I tried reconfiguring my account, but it did not change the start date.