Modify backup settings for single job

I created a backup job (full + incremental) with HD Manager 15 Professional
But now I can't find the way to modifiy/edit the backup job. No button, menu, setting to do this. I can only open the backup script in plain text and... do nothing (I guess I could but I don't have any intention to deal with the backup script code).

I found the settings for global file extension exclusion/inclusion but I'm not talking about this.
I'm talking that I would to remove or add some folders to the backup, and this seems to be not possible here.

Really is this program not provided with the option to modify a backup job? :confused: (with a GUI option, I mean)