They go into 2019's "Config" sub-folder. The easiest way there is through the program. Go to "Tools / Customize—›Options" page and click on the "Browse" button (address below). That will open "Windows Explorer" to the folder that contains the configurations that show up on the "Load From" list. Paste the copied files there.
C:\Users\your User name\Documents\TurboCAD 2019 x64\Config\Platinum
Designer, Deluxe, (Professional, Expert, Basic), Platinum
Windows 10 Pro (1903), 64-bit