Эта тема сейчас обсуждается на англо-говорящем форуме Ritlabs : http://www.ritlabs.com/en/forum/read.php?FID=5&TID=2968

А вот что говорит страница: http://www.vgirlos2.narod.ru/thebat.html

WARNING! This version doesn't work with "Google Desktop 4.0"

"Google Desktop Plug-In for The Bat! 2.0" is comming and will be avalable in June until then if you realy need this plug-in, try not to upgrade your "Google Desktop" to version 4.0, or just rollback to version 3.0.

Please be patient.

Thank You.

PS: This web-page is moving to new location in June, stay update...

Google Desktop Plug-In for The Bat! (www.ritlabs.com)
version 1.0.0.14

System requirements:
Microsoft Windows XP
Google Desktop 2.0
The Bat! 2.04.08

Download 381kb