Hi y'all. I could use some help here. I just spent all night editing a short 4 minute video and now Camtasia won't let me save it or save it as another file. I've been saving all along until the last few hours and now there's nothing that I seem to be able to do. I also get an error every couple tries telling me that the document's file had been changed by another app. This is not a great start for me with the app.