Engineer's Toolset will leave behind any application databases or configurations to ensure users don't lose their data during upgrades or migrations. To remove this data, you can simply delete the installation directory. However, I don't believe this is what you are referring to by "programming components".
Can you provide us more details on the registry settings and files left behind on your system (e.g. file names, and directories) and we'll do our best to assist you in removal?