Yes, you can. Open the file, make your edits and re-save it with a new name/number and current time/date stamp by clicking File > New. Then go back and reopen the file with the new name and publish the Dashboard. Here is a video tutorial:
Yes, you can. Open the file, make your edits and re-save it with a new name/number and current time/date stamp by clicking File > New. Then go back and reopen the file with the new name and publish the Dashboard. Here is a video tutorial: