Hey @kiels, thanks for reaching out to the Dropbox Community today.
If I understand correctly, when you change a file in the Dropbox folder on one computer, it also changes in the Dropbox folder of your second computer and you don't want that to happen, is that right?
If both computers are linked to the same Dropbox account, the Dropbox app will sync any changes you make on one computer with the other one; that's the nature of the app.
Would you like to disconnect the two computers?
Let me know and we'll go from there.