Tried this on three files. The simplest one was a single page .rtf file.
I got an error message on all files.
Alum/Black 2.4 GHz Intel Core 2 Duo iMac, 4 gbRAM, running Leopard 10.5.2
Don't waste your time.
FileWard
Powerful OpenSSL based file, data and clipboard encryption.
Version: 1.1.4