In case you are already working on some fixes:

If a save game is loaded and the player is inside a train I get the message "no train found". Leaving and entering again (enter+enter) and the error is gone.

Yeah I wondered when someone would notice this, it happens because the variable used to remember the last shuttle used isn't defined as a global and doesn't get saved, as such the feature only works on a per session basis, It's on the ToDo list for the next version though so stay tuned :)

In the latest version 0.17.6 the last used shuttle is now remembered between sessions :)