While we get that the makers of The Vault are trying to be clever by using banking terminology to describe the program's actions and features, the idea falls flat and creates an unintuitive interface.
After installation, we were asked to create a profile by entering a PIN. From there, we were taken to a paneled interface. At first it wasn't really apparent what we were supposed to do next. There's a menu at the top of the window, but the options were vague. It was only after we paid a visit to the Help feature that we discovered its drag-and-drop functionality, and what Withdrawals and Deposits meant. We dragged a file to the window and it was instantly added to the queue, but the original, unencrypted file remained. We weren't given the option of deleting the source file. Though you do have the choice of three algorithms, we weren't given a choice when we added the file. It also took another visit to the Help feature to figure out that right-clicking and selecting the Withdrawal option decrypted the file.
Even though its free, we found The Vault awkward to navigate thanks to the annoying banking references. We recommend you skip this in favor of the many other free file encryption programs out there. Lucky for us, it cleanly uninstalled from our PC.