Decrypt a sqlcipher database

1. To determine the pass key used to encrypt the attached database files

These database files are generated from a backup function in the android app. The apk file is attached in this project too.

2. To create a small decryptor and encryptor desktop application

I need a small application to decrypt the database files. I will then do some changes to the files and encrypt it back.

Files:
http://gofile.me/2hyJS/qraru1ihQ