Uninstall JetBrains Rider
The proper way to remove JetBrains Rider depends on the method you used to install it.
If you installed JetBrains Rider using the Toolbox App, do the following:
Open the Toolbox App, click the settings icon
for the necessary instance, and select Uninstall. 
If you are running a standalone JetBrains Rider instance, the default IDE directories are preserved when you remove your instance in case you want to keep your settings for later or to use them with another instance, another version, or another IDE. You can remove those directories if you are sure you won't need them.
Open the Apps & Features section in the Windows Settings dialog, select the JetBrains Rider app and click Uninstall.
Depending on your version of Windows, the procedure for uninstalling programs may be different. You can also manually run Uninstall.exe in the installation directory under /bin.
Remove the following directories:
note
The default location of the IDE directories has changed starting from JetBrains Rider version 2020.1. If you had a previous version, new installations will import configuration from the old directories. For more information about the location of the default directories in previous IDE versions, see the corresponding help version, for example: https://www.jetbrains.com/help/rider/2019.3/Tuning_the_IDE.html#default-dirs.
You can run the uninstaller with the /S switch as an administrator. The uninstaller is located in the installation directory under bin.
Run cmd (Windows Command Prompt) as administrator, change to the JetBrains Rider installation directory, and run the following:
>bin\uninstall.exe /S
If you installed JetBrains Rider as a snap package, use the following command to remove it:
$sudo snap remove rider