go to Window -> Work Space layout -> Reset '<your layout name>'
and Delete the Dreamweaver Cache file from the users configuration folder:
http://www.webassist.com/community/tutorials/view_tutorial.php?tid=95
if you continue to have errors, please provide more details:
What OS?
What Version of DW?
What extensions including the version numbers are installed?
OS windows 7 64bit
could not find the WinFileCache.dat
I tried to search with no results for WinFileCache.dat