Thank you for putting up the Dev build. This has allowed me to solve my problem. And... it's stupid. Files MUST be extracted to a folder named Shipbuilder. All one word. Any variation causes it to not be able to find the Data folder and then it can't load the CSV files. Like I said, it's one of those really dumb things that seems horribly obvious after it's found. I tested it repeatedly after finding it. However the files are set to locate folders, I suggest replacing a lot of it with wildcard sets like ../Shipbuilder_Data or however Unity tracks "in the folder I am running out of" rather than specifying the folder name that contains the program.
Viewing post in Rogue Trader (TTRPG) Ship Builder comments
I tried this and it didn't work, trying the dev build a series of errors appeared in the development console that looks like its trying to use the csv file locations on the dev computer instead of file paths updating to find it on my machine (as an example "C:/Users/redla/Unity/Gen 2/Shipbuilder/Assets/StreamingAssets/..." with it of course looking for each csv file in that location) I don't know if this is a problem specific to the dev build or if this is also occurring in the normal version, I don't know unity so I can only guess that its not resetting the variable that holds the streamingAssetsPath to match the new environment the program is running on.