Manual Update of BOClean crashes in Vista Business 64bit

i7 940
Vista Business 64bit SP1
nvidia 9800 GTX+ 512mb (dual cards)
Avast Home
Windows Defender
Windows Firewall

I'm in the early stages of getiing acquainted with the brave new 64bit world. Albeit, I wasn't brave enough to do it until SP1 was well seasoned. Installed Avast first then BOClean. Both installs were done from Administrator account not from an account with Adminstrator privileges. The crash of the manual update occurs in the Administror account. The crash of the updater occurred immediately after 2 installs as BOClean goes for the a new baddies list. It also occurs when I try to manually update.

Automatic update of BOClean works without an error - sofar -and have no reason to expect a problem.

Problem signature:
Problem Event Name:   APPCRASH
Application Name:   BOC4UPD.EXE
Application Version:   4.2.7.1
Application Timestamp:   00000000
Fault Module Name:   ntdll.dll
Fault Module Version:   6.0.6001.18000
Fault Module Timestamp:   4791a783
Exception Code:   c0000005
Exception Offset:   0005fc46
OS Version:   6.0.6001.2.1.0.256.6
Locale ID:   1033
Additional Information 1:   3712
Additional Information 2:   a2ef76e8438ae44178889c2396a636d3
Additional Information 3:   6377
Additional Information 4:   71198430879da76dc936892bb4dd426e

Glad to hear you're coming out with a standalone 64bit version of BOClean. Since my platform is very new and with little installed on it, maybe my problem will help you in its development. If you have any suggestions about stopping the updater from crashing on a manual update, I'd appreciate it.

Thanks.