yesterday I made a lot of updates, because I had problem with libraries and I fixed it, I was working with my old projects yesterday and everything looks right until today. I wanted create New Android Application Project. After last step I getting this window:
I looked on this topic and I deleted my Support library then re install but it didn't change anything. I tried Update eclipse, I find some sort of unimportant updates,I installed them but it didn't fix my problem too.