CSV is the default output for Crowl.
You can choose which pipeline to run in your project’s configuration file.
As CSV is the default pipeline, you won’t have anything to do if you didn’t change this setting.
See this page for more details.
When you launch a crawl with CSV pipeline, Crowl will:
foo_20180921-123000_urls.csv
.foo_20180921-123000_links.csv
.