Need help with Vault

Okay here’s the full thing: 
I recently remember that I had important files on my sandisk. I’d locked them on the vault. (around 2 years ago). So when I plugged in flash drive and opened it, there wasn’t the sandisk secure access program (The vault). So I downloaded it. It loaded with my old password and hint and it did work. The files were the same as I left them in the vault. However, every time I try to open/extract/edit them they won’t open. However, they’re there. They take space off my flash drive. And they do show their type (JPG, GID, Notepad etc.) which means that they’re not corrupted. I can’t open them. 
Is there something I can fix that? They got really essential information. 

Thanks