Sorry to correct you here, but under “Details” you will see where the “registered” content is located. No need to make use of any OS tools, to doublecheck it.
Please, please stop suggest to copy, move, delete any .vstsound files manually. This is for a very good reason the job of the Steinberg Library Manager. Even if a “manual copy” will work in the short run, in the long run this will just trigger new and even bigger problems, especially after updates.
best regards
Gerrit Junge