Can you upload a small testproject including a db file so we can check whats wrong?
Then use Project->Publish Project in the Lazarus menu and select that the files should be zipped.
The sql3connection was set to active in the IDE, but I changed it to unconnected.
Now I get the error message the data-stream format is not recognized. I have this problem on several different .db files,yet they can all be readok in dbbrowser for sqlite.