I had not been using automatic updating for each use because it took a long time.
In the future, I'll implement incremental updates. It'll be much faster than it is now.
I don't know what went wrong
I don't know either, but as I've told you, you've probably deleted a folder that you shouldn't have deleted. We'll never know for sure, but it seems to be the most likely explanation. Indeed, a bug could have corrupted some files, but I doubt that it would have made disapppear ALL the automatic backups like that.
I LOVE COOLLECTOR! Waiting for payday to reward your efforts! Thanks so very much.