I don't have much experience with Less, have quite a few changes that I want to make to the site with CSS. Is it possible to remove the LESS files and use the CSS files instead by changing the reference in the .info file to CSS instead?
Hello, Please do not remove LESS. you can add more CSS in .info file. No problem or you can do standard CSS in less file. Thank you.

After adding standard CSS in less file, how should I compile it please?

Hi blandon, Just use good formatted syntax (imitate what's already in the less files) and otherwise regular CSS code should work just fine. You'll see that you can recognize ordinary css in amongst the less code.