Update GUIDE.md

DESIGN.md

@@ -210,6 +210,6 @@ Chunk content is encrypted by AES-GCM, with an encryption key that is the HMAC-S
 
 The snapshot is encrypted by AES-GCM too, using an encrypt key that is the HMAC-SHA256 of the file path with the *File Key* as the secret key.
 
-These four random keys are saved in a file named 'config' in the file storage, encrypted with a master key derived from the PBKDF2 function on
+These four random keys are saved in a file named 'config' in the storage, encrypted with a master key derived from the PBKDF2 function on
 the storage password chosen by the user.
 

GUIDE.md

@@ -466,6 +466,7 @@ Duplicacy will attempt to retrieve in three ways the storage password and the st
 |:----------------:|:----------------:|:----------------:|:----------------:|
 | storage password | DUPLICACY_PASSWORD | DUPLICACY_<STORAGENAME>_PASSWORD | password |
 | sftp password | DUPLICACY_SSH_PASSWORD | DUPLICACY_<STORAGENAME>_SSH_PASSWORD | ssh_password |
+| sftp key file | DUPLICACY_SSH_KEY_FILE | DUPLICACY_<STORAGENAME>_SSH_KEY_FILE | ssh_keyfile |
 | Dropbox Token | DUPLICACY_DROPBOX_TOKEN | DUPLICACY_<STORAGENAME>>_DROPBOX_TOKEN | dropbox_token |
 | S3 Access ID | DUPLICACY_S3_ID | DUPLICACY_<STORAGENAME>_S3_ID | s3_id |
 | S3 Secret Key | DUPLICACY_S3_SECRET | DUPLICACY_<STORAGENAME>_S3_SECRET | s3_secret |

README.md

@@ -233,4 +233,6 @@ The following table compares the feature lists of all these backup tools:
 
 ##License
 
-Duplicacy is free for personal use but any commercial use must be accompanied by a valid [subscription](https://duplicacy.com/buy.html).  This applies to both the CLI and GUI versions.
+Duplicacy CLI is free for personal use without restrictions.
+
+For commercial use, a valid [commercial license](https://duplicacy.com/buy.html) is required for each computer on which backups will be created.  There are no restrictions if Duplicacy CLI is used to restore files from backups or check the integrity of backups.