I am assuming you have already set up a project in the Polyspace user interface and want to add a new file to this project. To do this:
- Right-click the project and select Add Source Folder.
- Navigate in your explorer and add the new file. The file should now show up in the project tree.
- Copy the file to a module. Right-click the file and select Copy to > Module_n. You can now run an analysis on the module. If you want to analyze this file alone, you can first create a new module (right-click and select Create new module).
R2016b is quite an old release, but the above steps should be available there.
In case your question is about simply adding a new file to a project, you can select File > New in the user interface and on the first screen, make sure that the box Use template is unchecked. You should be taken to a screen where you can add a new file.
