我在WIN7旗艦版環(huán)境下安裝S7-200的編程軟件，安裝過程中出現了一下的問題，請問這么解決。軟件版本是V4.0 SP9的。
“Unable to locate a valid executable for update, you must select the
directory where your previous version of Micro/WIN or Micro/DOS is
located.”