Their Telegram channel is full of people who are also against the recent change. Samoraui support replies that fiat display support is not going back to their wallet even if many people demand it. I doubt that anyone has an APK file of an older version, what a shame. It was really convenient for me to check how much USD equivalent in BTC I can spend on-the-go. I am going to continue using it since it's one of the best Android wallets I have used so far.