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.