I want to backup configuration of job, I am using to do this ThinBackup plugin in version 1.7.4 . And in every configuration of the job, there is something like `Promote builds when..`, how to backup this?
['https://Stackoverflow.com/questions/39487308', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/5612084/']
I ran into same issue and found this is an [open bug](https://issues.jenkins-ci.org/browse/JENKINS-21472). Looks to have a fix but a new version of the plugin hasn't been released.

A workaround which seems to work OK so far, is to separately backup the `config.xml` files under the `JENKINS_HOME/jobs/`. On Linux I ran the below from the Jenkins home directory to create this additional backup:

```
 $ find jobs -name config.xml -exec tar -rzvf /tmp/config.xml-BACKUP.tgz {} \;

```

So I'm still using ThinBackup to get all the other bits but after restoring its backup:

```
tar -xzf /tmp/config.xml-BACKUP.tgz

```

I then restored the jobs `config.xml` backup and restarted Jenkins.
They are a some options with the ThinBackup plugin:

[![enter image description here](https://i.stack.imgur.com/KlCz9.png)](https://i.stack.imgur.com/KlCz9.png)

Did you try to enable the "Backup build archive" option?