Nothing should *need* to be manually moved at all, but in your case something is certainly amiss.
Check in your Compiler/plugins-licensed folder to see if you have the DarkPhysics.dll file or not? If you do, you need to check it is activated. Run TGCOnline.exe in the Compiler folder. It will list all activated plugins, is Dark Physics on the list? If not click the 'Activate' button and enter your details.
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