I am running in to same problem where if I import lightshow that was exported from another computer I would need to manually change audio file path for all buttons in all live sets. While it can be done, doing it every time will lead to eventually making a mistake by selecting the wrong audio file and causing embarrassment at a live venue. I am surprised that this problem wasn't mentioned sooner.
I like the software a lot and use it for in every live venue I get so I hope you can address this whit a simple solution soon.