Try checking in CM, they are there especially if you select ALL, not download station. First 2 are built-ins, Sebino Lake first one, Edinburgh to Dundee 2nd one (also in UMR2020), 3rd is from Geophil, so probably a tile or texture that wouldn't be needed. 4th is track which is payware in Sebino Lake, and Cornish Mainline and Branches.