Use salt so no encrypted entry in the database look the same (Existed but removed due to issues!)
Improve enc and decryption speed (Got a lot better due to not encrypting non essential stuff)
The decryption causes the entire program to freeze and only the progress bar and console show it didn't hang itself. (Move decryption into a separate thread.)
Other issues are likely to be present but I'm currently unaware of them.
Here are some I know of: