Are you by any chance using an older Alpha release? We have had these export issues before, but that was (hopefully) fixed. The latest is Alpha 8.1. Please let me know which one you have? (You can check the version in the About window).
If this is an issue in the latest, this will be fixed at top priority – since exporting is super important and something most people are using. Luckily it seems it is working for most people. But I’m super interested to learn if you or anybody else is having this problem with the latest release.
To help you out right away, you are welcome to email your .ap files to me and then I can export them to mov or mp4 and send it back to you. Let’s use wetransfer.com or something similar if the files are large. My email address is the one I sent your activation key from (Sorry, I’m not mentioning it here, because spam bots will sadly pick it up).
Anyway, thanks a lot for posting this. Thanks for your nice words! Please let me know your version.
Best,
Niels