What happened was I was trying to delete some duplicate files i ftp'd to the root directory. I tried installing word press myself not knowing I could do it 1,2,3 with my web host. Hence, duplicate install files.
I accidentally deleted from within the root directory ... where the properly installed wordpress files were. I deleted files like wp-app and all those loose files not in a wp folder.
THEN I tried to re-ftp the missing files into the correct directory.
now I go to my admin site and it comes up blank
Have I screwed up so bad that I have to reinstall everything a go from scratch? What do I do?