She's still using tinder?

Hi everyone, I've been seeing this girl for 6 weeks now. We've been on 5 dates with the last two dates almost lasting 24 hours each and her sleeping over ;). On the fourth date she said she really liked me and on the fifth date, she said that I'm the first person she's gone on a date using tinder as I told her it was mine. We saw each other for consecutive weekends. However today, I downloaded tinder to look at our past conversation from when we first started talking and noticed that she changed her pictures. Should I be concerned?
She's still using tinder?
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