In order that the NLPG data is kept up-to-date you need to create a Workflow Job to run the Tasks required to import and build the NLPG data.
To do this you will need to add a Job entry. Right click on the Jobs entry in the tree and select New Job.
Job Name
Enter a unique name for your job. We have chosen Build from NLPG.
...
Now all you need to do is to make sure that the tasks are run in the correct order; you can use the up 
and down 
arrows to change the order:
...