Fantastic piece of software and an even better tutorial. However, I seem to be having the same issue, where, after building the project I encounter the emulator starting up and then simply resetting. Do you think you could reply with simple, bullet-point steps for the exporting process, please?
Try downloading version 0.7.8 and see if that fixes the problem. If the emulator is still coming up and then exiting then there might be a problem with that emulator. However, I've just added an option to export .tap files so you should at least be able to select File->Export game to create a file that should run on another emulator
It's me, the guy from Facebook who commented on your post yesterday. I haven't got around to testing the new version yet, but should do within the next few days. I'll let you know the outcome.