UpdraftPlus cron jobs do not re-spawn automatically when you delete them

Just sharing this solution for anyone else who may have a similar problem.

If you have a lot of unwanted cron tasks, you may need to delete them, either by clearing them from the database, or by calling delete_option( ‘cron’ ). (See this StackExchange WordPress Development post for more information about this.)

If you clear your cron tasks this way, you will need to re-save your settings in order to regenerate the cron tasks. Until you do this, your automated backups will not run (but manual backups will).

The settings will still be there, and you don’t need to edit anything. Just go to [UpdraftPlus top menu]->Settings, and the scroll down to the bottom and click “Save Changes”.