Complete 3.1 stable blog post.

docs/en/Blog-Posts/2020-09-03 v3_1_Release_Stable/POST.md

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+# ABP Framework 3.1 Final Has Been Released
+
+It is exciting for us to announce that we've released the ABP Framework & ABP Commercial 3.1 today.
+
+Since all the new features are already explained in details with the [3.1 RC Announcement Post](https://blog.abp.io/abp/ABP-Framework-v3.1-RC-Has-Been-Released), I will not repeat all the details here. Please read [the RC post](https://blog.abp.io/abp/ABP-Framework-v3.1-RC-Has-Been-Released) for **new feature and changes** you may need to do for your solution while upgrading to the version 3.1.
+
+## How to Upgrade an Existing Solution
+
+### Install/Update the ABP CLI
+
+First of all, install the ABP CLI or upgrade to the latest version.
+
+If you haven't installed yet:
+
+````bash
+dotnet tool install -g Volo.Abp.Cli
+````
+
+To update an existing installation:
+
+```bash
+dotnet tool update -g Volo.Abp.Cli
+```
+
+### ABP UPDATE Command
+
+[ABP CLI](https://docs.abp.io/en/abp/latest/CLI) provides a handy command to update all the ABP related NuGet and NPM packages in your solution with a single command:
+
+````bash
+abp update
+````
+
+After the update command, check [the RC blog post](https://blog.abp.io/abp/ABP-Framework-v3.1-RC-Has-Been-Released) to learn if you need to make any changes in your solution.
+
+> You may want to see the new [upgrading document](https://docs.abp.io/en/abp/3.1/Upgrading).
+
+## About the version 3.2
+
+The planned schedule for the version 3.2 is like that;
+
+* **September 17, 2020**: 3.2.0-rc.1 (release candidate)
+* **October 1, 2020**: 3.2.0 final (stable)
+
+You can check [the GitHub milestone](https://github.com/abpframework/abp/milestone/39) to see the features/issues we are working on.
+
+## ABP Community & Articles
+
+We had lunched the [ABP Community web site](https://community.abp.io/) a few weeks before. The core ABP team and the ABP community have started to create content for the community.
+
+Here, the last three articles from the ABP Community:
+
+* [ABP Suite: How to Add the User Entity as a Navigation Property of Another Entity](https://community.abp.io/articles/abp-suite-how-to-add-the-user-entity-as-a-navigation-property-of-another-entity-furp75ex) by [@ebicoglu](https://github.com/ebicoglu)
+* [Reuse ABP vNext Modules to Quickly Implement Application Features](https://community.abp.io/articles/reuse-abp-vnext-modules-to-quickly-implement-application-features-tdtmwd9w) by [@gdlcf88](https://github.com/gdlcf88)
+* [Using DevExtreme Components With the ABP Framework](https://community.abp.io/articles/using-devextreme-components-with-the-abp-framework-zb8z7yqv) by [@cotur](https://github.com/cotur).
+
+We are looking for your contributions; You can [submit your article](https://community.abp.io/articles/submit)! We will promote your article to the community.