It is really easy to import URLs for analysis. Simply right click in the big white 'URL List' box on the right.
You can choose to paste from clipboard or import from file. You can import multiple csv files at once, and URL Profiler will deduplicate the URLs for you.
Note: URL Profiler can recognise many default file types and automatically detect the column you wish to import. However if it fails to auto-detect, simply add a column heading of 'URL' for the column containing the URLs you wish to analyse.
URL Profiler can also import your URL list from a sitemap XML file (e.g. example.com/sitemap.xml) or even a sitemap index file (e.g. example/sitemap_index.xml).