When a job is edited and then saved the result is changed from “%” to “-“
You have to edit …_options “table” look for backwpup_jobs record
edit and search and replace e.g. “-Y-m-d-H-m-s” replace with “%Y%m%d%H%m%s”
* do not change the length of the string
You also need to fix your jobs. see archive name
