As you know (and which is probably the reason why you upgraded), the free version of the Turbo products does not allow to install third-party components. When you install any third-party components, they show up in the Component Palette dialog, but cannot be activated. If you installed the SDL Suite (or any other third-party product) before upgrading to Turbo Delphi Professional, you simply have to activate the additional components manually.
To do so, start Turbo Delphi/C++ and click on "Component/Install Packages". Scroll down the box listing all components and tick off the SDL components in the following order:
- SDL BasePack
- SDL MathPack
- SDL GuiPack
- SDL GeoPack
- SDL ChemPack
- SDL ChartPack
Click OK to close the dialog. Now the SDL Components will show up in the Tool Palette when you create or open an application.
Hint: If the SDL components do not show up in the Install Packages dialog, you have to reinstall the component suite.