After stopping a backup cannot start afresh

Hi. I stopped a “Backup Now” backup yesterday (it was still in the process of creating the zip files) and now I cannot start a new backup. It keeps trying to continue from yesterday (which I do not want it to do) but never completes. How do I clear out the job from yesterday? I am using the free version 1.22.11

I am also now seeing a warning “Warning: WordPress has a number (37) of scheduled tasks which are overdue. Unless this is a development site, this probably means that the scheduler in your WordPress install is not working” I have followed the link but I do not think any of the FAQ “My scheduled backups do nothing, or “Backup Now” stops mid-way” are applicable??

Any help would be appreciated. I have used UpdraftPlus for backups for a number of years – this is the first time I have had any problems ??