Update DESIGN.md

DESIGN.md

@@ -137,7 +137,7 @@ hasn't been found, the next file, if there is one, will be read in and the chunk
 files were packed into a big tar file which is then split into chunks.
 
 The *content* field of a file indicates the indexes of starting and ending chunks and the corresponding offsets. For
-instance, *fiel1* starts at chunk 0 offset 0 while ends at chunk 2 offset 6108, immediately followed by *file2*.
+instance, *file1* starts at chunk 0 offset 0 while ends at chunk 2 offset 6108, immediately followed by *file2*.
 
 The backup procedure can run in one of two modes. In the default quick mode, only modified or new files are scanned. Chunks only
 referenced by old files that have been modified are removed from the chunk sequence, and then chunks referenced by new 
@@ -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.
 
-There 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 file storage, encrypted with a master key derived from the PBKDF2 function on
 the storage password chosen by the user.
 

GUIDE.md

@@ -160,6 +160,7 @@ OPTIONS:
    -fossils                 search fossils if a chunk can't be found
    -resurrect               turn referenced fossils back into chunks
    -files                   verify the integrity of every file
+   -stats 			show deduplication statistics (imply -all and all revisions)
    -storage <storage name>  retrieve snapshots from the specified storage```
 ```
 The *check* command checks, for each specified snapshot, that all referenced chunks exist in the storage.

README.md

@@ -1,10 +1,12 @@
 # Duplicacy: A new generation cloud backup tool
 
-This repository contains only binary releases and documentation for Duplicacy.  It also serves as an issue tracker for user-developer communication during the beta testing phase.
+Duplicacy is a new generation cross-platform cloud backup tool based on the idea of [Lock-Free Deduplication](https://github.com/gilbertchen/duplicacy-beta/blob/master/DESIGN.md).  It is the only clould backup tool that allows multiple computers to back up to the same storage simultaneously without using any locks (thus readily amenable to various cloud storage services).
 
-## Overview
+The repository hosts design documents as well as binary releases of the command line version.  There is also a Duplicacy GUI frontend built for Windows and Mac OS X downloadable from https://duplicacy.com.  The source code of the command line version is available to the commerical users of the Duplicacy GUI version upon request.
 
-Duplicacy supports major cloud storage providers (Amazon S3, Google Cloud Storage, Microsoft Azure, Dropbox, and BackBlaze) and offers all essential features of a modern backup tool:
+## Features
+
+Duplicacy currently supports major cloud storage providers (Amazon S3, Google Cloud Storage, Microsoft Azure, Dropbox, and Backblaze) and offers all essential features of a modern backup tool:
 
 * Incremental backup: only back up what has been changed
 * Full snapshot : although each backup is incremental, it must behave like a full snapshot for easy restore and deletion
@@ -14,7 +16,7 @@ Duplicacy supports major cloud storage providers (Amazon S3, Google Cloud Storag
 * Concurrent access: multiple clients can back up to the same storage at the same time
 * Snapshot migration: all or selected snapshots can be migrated from one storage to another
 
-The key idea behind Duplicacy is a concept called **Lock-Free Deduplication**, which can be summarized as follows:
+The key idea of **Lock-Free Deduplication** can be summarized as follows:
 
 * Use variable-size chunking algorithm to split files into chunks
 * Store each chunk in the storage using a file name derived from its hash, and rely on the file system API to manage chunks without using a centralized indexing database
@@ -153,7 +155,7 @@ Storage URL:  azure://account/container
 
 You'll need to input the access key once prompted.
 
-#### BackBlaze
+#### Backblaze
 
 ```
 Storage URL: b2://bucket
@@ -161,7 +163,7 @@ Storage URL: b2://bucket
 
 You'll need to input the account id and application key.
 
-BackBlaze offers perhaps the least expensive cloud storage at 0.5 cent per GB per month.  Unfortunately their API does not support file renaming, so the -exclusive option is required when pruning old backups.  This means concurrent access and deletion can't be permitted at the same time.
+Backblaze offers perhaps the least expensive cloud storage at 0.5 cent per GB per month.  Unfortunately their API does not support file renaming, so the -exclusive option is required when pruning old backups.  This means concurrent access and deletion can't be permitted at the same time.
 
 ## Comparison with Other Backup Tools
 
@@ -195,6 +197,10 @@ The following table compares the feature lists of all these backup tools:
 | Encryption         | Yes       | Yes | Yes               | Yes             | Yes               | **Yes**       |
 | Deletion           | No        | No  | Yes               | Yes             | No                | **Yes**       |
 | Concurrent Access  | No        | No  | Exclusive locking | Not recommended | Exclusive locking | **Lock-free** |
-| Cloud Support      | Extensive | No  | No                | No              | S3 only           | **S3, GCS, Azure, Dropbox, BackBlaze**|
+| Cloud Support      | Extensive | No  | No                | No              | S3 only           | **S3, GCS, Azure, Dropbox, Backblaze**|
 | Snapshot Migration | No        | No  | No                | No              | No                | **Yes**       |
 
+
+##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.