I believe a TMP file may appear when you have a crash. If you're not crashing, you could shut down TC and delete the contents of the "Built-In" folder. The program will rebuild these files after running once. "Built-In" is a 'hidden' folder and can be set to 'show' at "Tools / Folder Optionsâ€”â€ºView" page in Windows Explorer.
C:\Users\your user name\AppData\Roaming\IMSIDesign\TurboCAD\17\Professional\Profiles\Built-in
then browse to the "Built-In" folder
Hopefully this will stop TC from making extra files.
Designer, Deluxe, (Professional, Expert, Basic), Platinum
Windows 10 Pro (1903), 64-bit