I have just released V1.0.7.1 of the Plymouth route demo. This adds in a 1980's route file, and a minor bugfix at Saltash.
To accomodate the new period, I have had to make relatively major folder structure changes in several places, and this means that there is no upgrade. This means that you should delete the C:\program files\bve\railway\route\Plymouth- St Austell Demo & C:\program files\bve\railway\object\plymrb folders to eliminate possible conflicts.
http://www.bvecornwall.co.uk