You can open the drawing that contains the Material in TurboCAD 2019 and go to the Materials palette, "Active Drawing (drawing name)". Right-click on the Concrete material and use "Copy Selection to TC Database".
Another option is to use "Options / Materials / Load Materials…". Look for the "propin.dat" file in your old version. Uncheck "Select All" and pick/select either a particular category or material, then Open.
Designer, Deluxe, (Basic, Expert, Professional), Platinum
Windows 10 Pro (1909), 64-bit