How does one manage one's personal style sheet--i.e. edit or delete it--after uploading it?
To change it, just change your local copy and upload it. To revert to whatever JohnRob has, hit the Reset button.
If you need to download it again to edit it, you can get it as a text/css document at http://www.freerepublic.com/perl/css
You can delete it by hitting "Reset" on the upload form.
There will eventually be a much better interface. This is mostly a technical preview.