diff --git a/.gitignore b/.gitignore
index 71a9d6a..bc3dd24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 ACTIVATION
 .authcode
+*aax
+Audiobook/*
diff --git a/AAXtoMP3 b/AAXtoMP3
index df3fb02..c743d07 100755
--- a/AAXtoMP3
+++ b/AAXtoMP3
@@ -15,8 +15,8 @@ if ! [[ $(type -P "$GREP") ]]; then
 fi
 
 if [ "$#" -eq 0 ]; then
-        #echo "Usage: bash AXtoMP3.sh [--flac] [--aac] [--single] AUTHCODE {FILES}"
-        echo "Usage: bash AXtoMP3.sh [--flac] [--single] AUTHCODE {FILES}"
+        echo "Usage: bash AXtoMP3.sh [--flac] [--opus ] [--single] AUTHCODE {FILES}"
+        echo "	Note that order does matter!"
         exit 1
 fi
 
diff --git a/README.md b/README.md
index fc665b4..dd2cdfd 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Thanks to kbabioch, this script has also been packaged in the [AUR](https://aur.
 
 ## Usage
 ```
-bash AAXtoMP3.sh [--flac] [--single] AUTHCODE {FILES}
+bash AAXtoMP3 [--flac] [--opus] [--single] AUTHCODE {FILES}
 ```
 * AUTHCODE: **your** Audible auth code (it won't correctly decode otherwise) (required)
 * Everything else is considered an input file, useful for batching!