I've had similar problems John, such as an baffling failure to recognise Just Trains stock that is already installed on my system.
Also, the inability to uncouple stock attached to the tender also affects loco 9351, which comes with the new release of this route. This problem fatally breaks at least two of the included scenarios. The Manor class locos that you're missing can be obtained from the
Steam Sounds Supreme site. However, I'm reluctantly giving up on this route, however good the terrain and scenery may now be, until an update fixing these fundamental problems is made available.
Also, without wishing to sound ungrateful or churlish in any way, if you're going to re-do the WSR to address important inaccuracies and omissions with the RSC/DTG route, I'd have thought that including some of the most iconic landmark features of the real route, such as Dunster Castle, Washford telecommunications aerials, Minehead Sewage treatment works, Bishops Lydeard church, etc might be near the top of the to-do list!
The scenarios that were included with v1 of the Members' Edition can be moved over to v2 but they require quite a bit of serious tweaking before they'll work.
Ash