If you don't want Scribe to keep trying to load the last file you asked it to, you have to move the file from its present location.
Is the file very large? When Scribe loads these, among other things it converts the audio into a kind of wav file, which can get quite large, and there may be a limit... perhaps a couple GB... which might account for its crashing. If it's possible to divide the mov file into 2 smaller files, and load one, transcribe it, delete it, and load the second, etc. Or, if you don't need the video, extract the audio (you can do this with Switch, but you need to get the Pro version.)
If you do divide it and there's something in the mov file causing ES to hang, you'll know pretty quickly, I should think. --KRN