Never used the plugin, but there are a lot of ways to create a custom path following system with splines.
If you are moving a space ship I would suggest you follow and modify this tutorial.
Apply what you learn of how it works by removing the nonsense with the timeline - which will obviously never work in space distances due to floating point precision - and converting the system to use the tick event.
Memorize the value of Speed x delta time
plus the previous value of the same variable, and you get a float that contains a diatance over time…
Apply that based on the spline lenght.
Meaning from 0 to the length you are going one way.
if you reach the lenght you probably reverse, reset the distance, and go spline length - distance to get the opposite effect.
It’s a decent 15minute custom system that just follows whater spline you create at a customizable speed. At the cost of each ship being powered on tick ofc.