Impossible to change currency!

I would have given this app 5 stars, if not the issue with the currency. It is impossible to change it, making the app almost useless, because I must edit all my rides on a desktop computer. I drive a lot in Europe, but I use the app in English, so the currency is in Pounds. How useful are Pounds in Europe exactly?!
Please add the currency change feature!

Soom the Scarabeus about BlaBlaCar: Carpooling and Bus, v4.7.3