This was the behavior in previous versions (at least it was for SQL Compare 10) and not sure when it was changed. But constantly switching folder paths make it error-prone and annoying. As an example, let's say I first chose Folder A/Folder B as Source and then Folder C/Folder D as Target. If I go back to source to pick another folder, now it points me to Folder C/Folder D instead of Folder A/Folder B as I originally selected.