QUOTE:
add: feb 09, please report / post if the solution below solved the problem - dolesoft

The package integrety check failed /not a valid win32 application error you get when downloading a newer version can be solved by cleaning the cache of your internet explorer.

Please go to: http://www.microsoft.com/windows/ie/ie6/using/howto/customizing/clearcache.mspx


To clear your cache:

1.
On the Internet Explorer 6 Tools menu, click Internet Options. The Internet Options box should open to the General tab.

2.
On the General tab, in the Temporary Internet Files section, click the Delete Files button. This will delete all the files that are currently stored in your cache



Or if you have IE7:
http://www.mvps.org/winhelp2002/delcache.htm

Close all instances of Outlook Express and Internet Explorer and
Windows Explorer (yes Windows Explorer uses the Internet also)
Control Panel | Internet Options | General tab
Click the "Delete Files" button

After cleaning the temporary files download babymouse again and you won’t see the not a valid win32 application (I hope )

Please post your experiences here, did this solution help you or not?

QUOTE:
You don't have to register to post, just post it B)

thank mike