_ I didn’t encrypt them in the first place!.. _
Actually you did, as soon as you placed them in the Vault. When you open the vault, with SecureAccess, it allows you to extract (drag & drop) files from within it to non-encrypted locations, outside the Vault, so you can work with them. Edit them, change them, etc. Then when done put them back in the Vault, using SecureAccess again.
However, your situation sounds similar to another one posted recently. See if this thread helps you.
http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Need-help-with-Vault/td-p/322024
