I try to edit my video then get a message pop up saying (an error occurred while processing the undo buffer. You save your work immediately using a new filename and restart VEGAS PRO) Then it doesn't let me save and when i restart the computer i get the error code 59 when trying to open up VEGAS. Then i get a message saying (An error starting Vegas Pro. There is no License to use this software). I have purchased this software outright so I don't know why it is saying this. I have reinstalled the software twice but i keep getting the problem.