SanDisk Secure Access V3 fails to start

Check your Recycle Bin to see if the file got accidently deleted.  If not there try one of the free undelete apps posted here to see it’s still on the drive.

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Download-new-version-lost-access-to-all-data-Please-Help/m-p/301789#M5953

If that doesn’t help you may have to reinstall the SecureAccess app.