Now that you have purchased TechTool Protogo, you have TechTool Pro installed as well.  To run TechTool Pro on your Mac without installing it on a Profile, you simply have to double-click the app icon.  That's all.  For convenience, you may want to drag the TechTool Pro icon to your Dock.  You can even copy it to your Applications folder if you want.  Just make sure it stays in the Protogo Applications folder so that it gets copied to the Protogo devices you create.