Update README.md

Author: Map1e-fans

README.md

@@ -1,2 +1,7 @@
-*  Before using this tool, you must install JDK-17 and start RM2PT with JDK-17.
-* You can use the following link in RM2PT's plugin installer: https://map1e-fans.github.io/com.rm2pt.generator.testgen.release for installation, also can use in publish pages download jars plug-in installed in offline installer.
+### Before using this tool, you must install JDK-17 and start RM2PT with JDK-17.
+* You can use the following link in RM2PT's plugin installer for installation:
+  - https://map1e-fans.github.io/com.rm2pt.generator.validgen.release
+* The offline installer can be downloaded in here:
+  - https://github.com/Map1e-fans/com.rm2pt.generator.validgen.release/releases/download/Release/ValidGen.jar
+* You can also download ValidGen installed in RM2PT here:
+  - https://github.com/Map1e-fans/com.rm2pt.generator.validgen.release/releases/download/Release/RM2PT.with.ValidGen.zip