I have TSW 2020 on disk and it has a few add ons and the two that came with it Rapid Transit and Great Western Express however when I accessed add ons on the store my preserved routes do not give an option to download just to buy where as my add ons from xbox store worked fine, any help on this would be great, Thanks.
Start by opening TSW2020 rather than TSW2. In TSW2020, access the store, then scroll right. You should see "free" versions of GWE and RT listed there. If you download them they'll appear next time you open TSW2.