Hey Alabastor! thanks for the great feedback, I am working on a patch that should address some of the main issues causing crashes, and I should have it up tomorrow!
I have seen the weird trader bug. I may very well remove some of the pause functionality at least on the traders. (I used to not pause them and it worked pretty well).
My assumption about the swap bug, is that somehow one of the ships either the moonbike or frigate got destroyed or lost somehow, and when attempting to swap the game couldn't find the ship any more and that caused the crash(based on the error you posted). This one I haven't seen before, but I should be able to come up with a solution fairly easily.
very annoyingly I forgot to make the discord link permanent so it's expired *facepalm.
I hear you on the swap mechanic being a bit fiddly with the way it is currently implemented. but it will take a bit of time to rework the UI for a better solution, so that will likely remain for the moment. but I will be addressing it in the future.
Sorry for the inconvenience of the bugs. I am really glad you like the concept and feel like it has potential! gonna fix the discord link on my page as well today so if you do want to pop in, you can, I'll likely post the build there first this evening for some initial playtesting.
hope you have a great day!
Womp.