v2.0

1. Migrate to SQLite3 database.

.gitignore

@@ -149,4 +149,4 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
-assignments
+scores.db

README.md

@@ -2,6 +2,7 @@
  Customize, manage templates of rubrics and fast grade HTML/PDF files
 
 ![](https://shields.io/badge/dependencies-Python_3.11-blue)
+![](https://shields.io/badge/OS-Windows_Vista_+-green)
 
 ## Usage
 
@@ -20,8 +21,6 @@ It occupies localhost 5000 port by default.
 - [Customize host of Flask application](https://flask.palletsprojects.com/en/2.3.x/quickstart/)
 - [Customize port of Flask application](https://flask.palletsprojects.com/en/2.3.x/server/#address-already-in-use)
 
-Read the [operation manual](manual.md) to preview software functions.
-
 **Release:**
 
 1. Download and unzip the release.