Articles Bug

Hello,
I have a problem with "Articles". Accidentely I deleted some files of "Articles". After that I deinstalled "Articles", then I deleted it, downloaded "Articles" again and installed it.
My problem is now:
I create a new article-container and after I save it, the settings-window on the right side disapears. When I click then on my article-container in my resource-tree, the area on the right side stays empty, so I cannot make any setting changes anymore. I do not know how to fix this and I hope you can help me!

Thank you very much,
Annkatrin