You only gave me 1 minute and I don't often check comments on these mods (I'm more commonly on the main Triage mod)

As for what happens, you lose the ship associated with the character with that UID
Each character has a .player and a .shipworld, both with the same UID (That's the jumble of numbers and letters). An easy way to figure out what UID a certain character has is to load that character, then save the game and close it. The most recently changed .player and .shipworld files will be that character's.

Your other ships will be safe.

i want to get the USS polaris for human , but my game wont load and the modder wont answer my comments :P

ive got a question that only a ship modder can answer , apparently

what happens when you go to the delete shipworld file?

do you lose all your characters ships?