Edit: Seeing as you edited your post....
The attitude will not help you. People have bent over backwards to be accommodating.
Also, if you know what drag and drop is, why do you need to ask the question?
If you never had problems until you got the new computer, then why is this BCUT's fault?
As to your last remark about it not being in the instructions; if you know about drag & drop, why does it need to be?
It seems to me that dragging and dropping your BCMod file onto it is what is implied here, so the answer is somewhat obvious, in that it depends where you've stored your BCMod files, no?
Please use a little common sense, and if you don't understand terminology, either google it or search for it on the forums.
El.