Mention that you need password :-)

Author: dchest

README.md

@@ -4,6 +4,8 @@ This cross-platform command-line program decrypts journals encrypted with
 [Mémoires 4.0][mem] and later.  The result of decryption is the original
 unencrypted journal (which is an SQLite database file).
 
+*Of course, you need the original password to decrypt.*
+
 The program is freely available under the 2-clause BSD license as an
 anti-lock in initiative of [Coding Robots][cr], makers of Mémoires.
 We support open standards and data portability.