Check if the new version is compatible with your previous save files. Major version jumps (e.g., 0.6 to 0.7) can sometimes break older saves.
The developer has transitioned to a custom "engine" to allow for faster updates and smoother rendering. Installation Guide for APK If you are using the APK version for Android: Exchange Student [v0.7.0.p4b] [APK]
Bug fixes and "remakes" of existing scenes to improve visual quality. Check if the new version is compatible with