Training data stuck again (On the verge on quiting this website)

I am about to complete my greatest model yet only for it to freeze at the last moment. There are no backups, and the download button freezes too. And the training data I currently have well behind the progress I have made to reach this point. Two days of work about to go waste! I'm leaving my device in sleep mode until someone presents a solution; otherwise, I will quit making models altogether since this website has no fail-safe feature for situations like these.