Can i ask you how? Install Bethesda Archive Extractor. Decompress SkyUI 5.1 in an empty folder. Extract the content of SkyUI.bsa in that folder. Delete SkyUI.bsa. Manual install in "Data" folder. Otherwise: Compress ALL the content of that folder in a new compress file (7Z, Rar, or Zip) and than install with NMM (add it pressing the green "+ " large buttom).