you can still salvage some of the playlist but from what you described, it does appear your whole library management process was not optimal to begin with.
to salvage playlist - use lexicon
upload your old HD engine library database with the playlist to lexicon
disconnect the HD from laptop
connect the new SSD (that you copied the tracks to)
Use the relocate function in Lexicon to find the tracks in the new drive (SSD)
now download the relocated playlists to your engine library from lexicon