Sandisk Secure Access does not open up after crashing


Can anyone help me to recover my files. I have stored files in Sandisk Secure Access V3 on Mac for some time now. Just today I was going through some and decided to delete the folder. During deleting the app crashed and would not respond so I had to force eject the disk.

After reloading the app and putting the password in it says this error message: 

This archive was created with a newer version and cannot be loaded.

I’m really worried that I lost all my files.

Please can anyone tell me how I can fix this again?