Graco Nautilus Adjustments

Hello!
We just got a Graco Nautilus car seat for our 4 year old daughter. The crotch strap has to be adjusted from the original slot to the next one. My husband and I have both tried to get that strap out of its slot and were not successful. Has anyone had the same problem and found a brilliant solution that we could try?

Thank you!

We had the same problem but I finally just worked it through. I wonder if you could use a nail file to make the slot a little bigger. Good luck!