I deleted the Sdl.Core.PluginFramework.PackageSupport.dll file in the C:\Program Files (x86)\SDL\SDL Trados Studio\Studio16 folder for my mistake and Trados 2021 doesn't work anymore.

So I tried to delete the Trados 2021 and reinstall it in Control Panel.

But it failed with this message.

The setup did not complete. The error is:

Setup has detected a different version of this product already

installed. If you still wish to remove or repair that version, you

must use that version's installer.

I also have tried to reinstall it with a recent installation file, but it failed with the same message.

Please let me know the way I can reinstall it.