Welcome to the Forums from me as well.
I am glad you are all working now. There is a vast amount of enjoyment to be had from MSTS.
as older routes do tend to use an older version of the standard tSection as Ash says it is worth keeping a selection of the releases the best two to have are, tSection 38 and tSection 42UK.
It is worth investigating using Train Store (if you are not already).
There is the option to set which tSection is used with which Route and automatically choose it when an act is started.
It's all in the Manual named "TrainStore.pdf".
And may I praise your poilte posts well done.
There so many one line queries with no hint of a name or even appreciation.