Old installation files

Whenever I receive a notice for a codec undate, I install it right away, so I'm always up to date. So, is it necessary for me to keep the installation files for all of the previous versions, or may I delete them? Thank you to anyone who can provide a valid and prompt response to this question.

No, you can delete them.

And if you ever need to revert to an older version for some reason, you can download old files on the website.