Minecraft wiki entry for Saved_data_Dropbox_guide, associated text: Once these files are done copying, navigate back up to your AppData folder, and rename the .minecraft folder to .minecraft2 (for files that begin with a "." such as ".minecraft" Windows may give an error message when renaming and refuse to rename. If this happens try to rename the file to ".minecraft2."; this will rename the file to ".minecraft2" without the previously typed period at the end of the title.)