When you go to Settings\Job Settings\Loading tab, this list of loading is stored in the Standard Load File called the Stdloads.CFG. This file is located in the USR01 folder and gets copied into the job folder when a new job is first created. If you have copied a job from another PC that doesn't have your loading or you would like to add a new load case to the list follow these steps.
Go to Settings and select User Preferences.
Select the Support Files tab and look for the Standard Load File. Here you can location the path to your current Load file or you can click on Edit to add new load cases to your list.
To use the loading listed you would open windows explorer and browse out to the path listed for the Standard Load file. Find the Stdloads.cgf file and copy it into the job you are currently working on.
Relaunch the software and now you should have your Standard loading copied into the current job.
Please reach out if any further assistance is required.
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