the base href tag goes on the pages that should show the image but need the full path just after the <head> tag.
for the file manager icons, it looks like the ,files in the webassist/kfm folder are corrupted.
when I download the webassist/kfm/index.php page, the code in that file and others I download is double spaced, this can cause php errors and I have seen it cause the problem with the icons.
use file zilla or another 3rd part ftp program to upload the webassist/kfm folder to the server.