How to update Visual Studio extensions from marketplace?

Update Visual Studio extensions from marketplace

The "already installed" exception may occur when updating an extension via Visual Studio > Manage Extensions > Updates, especially if the extension was originally installed in administrator mode. Since the Syncfusion® installer installs its extensions in admin mode, this issue can arise when attempting to update the VSIX directly from the Visual Studio Marketplace. This is a known issue in Microsoft Visual Studio, and Microsoft has acknowledged it with a promise to address it in a future release. In the meantime, as a workaround, you can update the extension to the latest version using the Command Prompt.

Download the latest version of VSIX from Marketplace, and pass the arguments in the following screenshot to VSIXInstaller.exe, which is located in the Visual Studio installed location {e.g., C:\Program Files (x86) \Microsoft Visual Studio\2019\Professional\Common7\IDE}, and it will be updated to the latest version.