I really want to change my theme or at least edit the theme I have (Twenty Eleven) but the live preview is not working. It shows up blank (no matter which theme I am trying to preview or customize) and if I try to upload a new header image, it shows up blank. I'm having a few other problems as well.
Basically I think I may need to reinstall but I'm worried about losing everything (my pages, posts, media library, ect...)
So what I need to know is: Will I lose everything or is it protected somehow?
or is there another way to solve this problem?
(I do have backups of my website)