The SQLite file format is identical on all versions of Windows. We can't help you with 'sqlite studio'. It's not part of SQLite and the SQLite team didn't develop it. The most likely cause of your problem is that the different programs you're using expect to find their databases in different folders. You crease a database using one of them, and it's stored in one folder. You tell the other to open a file of the same name but it's looking in a different folder so it doesn't find it. Fixing this is nothing to do with SQLite. If that really is your problem, you need to understand Windows folders and paths better.