I am using WinEdt(Build: 20110315 (v. 6.0)) with MiKTeX(2.9.4282). I have used it for years, it was all OK one hour ago. But now I cannot click the button to run the cmd. I do not know what I did any thing wrong. When I click the pdflatex icon(or any others cmd, next the recycle bin icon), it simply says in the windows
Startup folder: E:\Poster_Li
Error launching Console Application PDFLaTeX Command Line: pdflatex.exe "filename.tex" Startup Folder: E:\Poster_Li
Invalid folder name (above in English, this line is given in local language).
It seems that the Startup folder is fixed to E:\Poster_Li. I have deleted E:\Poster_Li. On the other hand, I can still use cmd line such as pdflatex filename.tex to compile files (I do not like this way.).