本人在装编程软件STEP7-MicroWIN_V40_SP6会遇到这个问题(<span lang="EN-US"><font face="Times New Roman">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.)</font></span>,然后弹出个选择文件夹的对话框,就装不下去了。我下的只有一个EXE文件,请问高手们哪里出了问题了???