When installing Trados Studio 2019 after using a trial version, it says "Setup did not complete. The error is: Setup has detected a higher version of this product already installed. If you still wish to install this version, you must remove the other version first."

Thus, I removed every SDL product except one: SDL Trados 2019 SR1 - Remove suits of products.

I tried to uninstall it on Control Panel, but this message popped up. "Setup did not complete. The error is: Setup has detected a higher version of this product already installed. If you still remove or repair that version, you must use that version's installer."

What should I do now to successfully remove the trial one and install a purchased product?