Hello! Thank you for your message. My response is a bit delayed, but I wanted to get back to you.
I do not plan to update this mod to 2.0, as I believe the new train schedule interruption system makes it obsolete.
For your use case, setting station 3 as a single entry in the schedule will work as a parking slot, while moving stations 1 and 2 into interruptions with the corresponding conditions. You may also need to add one more interruption for refueling, as the train will not visit the parking spot while both stations 1 and 2 remain open.