README.md: update the usage for options and example

README.md

@@ -7,18 +7,27 @@ Convert from Twitter's downloaded archive to markdown files
 ./tweetzip2md *.zip > README.md
 ```
 
-tweetzip2md creates markdown files whose name are like `./2019/12/30.md` and outputs index to STDOUT.
+tweetzip2md creates markdown files whose name are like `2019/12/30.md` and outputs index to STDOUT.
 
 ```
-$ tweetzip2md -h
-Usage of tweetzip2md:
-  -b string
-        relative path from index to each markdown (default ".")
+$ tweetzip2md.exe -h
+Usage of tweetzip2md.exe:
   -d string
         root directory to output (default ".")
+  -show-reopen-date
+        show date on opening for append
+  -show-source-name
+        show source JSON in zip-file
 ```
 
-If you want to make markdowns to put on GitHub, for example:
-```
-tweetzip2md -d ../tweets -b blob/master *.zip > ../tweets/README.md
-```
+Supported JSON Version
+----------------------
+
+The versions used on downloaded zip archive at these dates.
+
+- Jan.13, 2023
+- Jul.26, 2018
+- Jul.12, 2018
+- Jun.13, 2017
+- Sep.19, 2017
+- Dec.12, 2017