Hi All
Any DLCs from the Trainz Store and Steam store are the same downloads (same for the Mac AppStore). In the case of the Tidewater DLC, an update was released in June 2022 which resolved the issues reported in most reviews on Steam from memory; it certainly resolved the issues being reported to us directly.
DLCs purchased through the Steam store, for the selected version of Trainz, will be shown under their name in the Content Store tool in Trainz.
For DLCs purchased through another version of Trainz, or through the Trainz Store, these will be shown under their ID numbers instead of their name. This is due to the way that Steam requires DLC packs to be handled unfortunately.
Regards