Wesley,
My best guess would be that you never told Studio One where then new location is for your "VST Plug-Ins".
If that is the case, it is an easy fix:
1. Open any of your songs.
2. From the menu at the top, select "Studio One", followed by "Options".
3. From the items on the top, select "Locations" (probably the second from the left.)
4. From the next set of options that pop up, select "VST Plug-Ins" (probably on the far right.)
Now from this screen, you can see where Studio One thinks your plug-ins are located. If you don't see the location where you moved them, you can click "Add" (toward the lower-left of the window) to add the file path to the new location.
Let us know if that fixed your issue please.