PIU Clear Manager

Invalid date

1. Lowest downloadable version has been changed to Android Oreo(8.0)
2. Multiple file load is available
3. Swipe down does not refresh page anymore
4. CSV file backup feature added (File will be saved as PIUManager_Backup.csv in Download folder, and can be used in piu.nira.one)

* If you edit backup file and want to restore to applicaiton, Please change userdata.csv file inside /Android/data/one.nira.piu/files