version 0.7.3.2 and above with v.0.6.3 is different. it can not be equated. because the latest version uses 64 bit while v.0.6.3 uses 32 bit. so it will definitely conflict with the previous version. so the only way is to delete and download the latest version.
Viewing post in (WIP) Hailey's Treasure Adventure comments
means you have to delete manually. open the android file explorer/data/com.LAGS.HaileysAdventure/files. those files in .txt format are deleted only. then try opening the game again. oh yeah, make sure you are using v.07.3.3 not 0.7.3.2 because 0.7.3.2 requires streamingasset. while the latest one does not.
Good Luck...