Version 2.0.0.998 with x64 Windows 7
Registry Finder fails to find many references to "Avast4." Awaiting developer response.
The folder "C:\Program Files\Alwil Software\Avast4\" no longer exists on the system, but the registry contains several references to it.
The program finds the references in HKLM, but misses those in HKCU and HKUS.
Keys found by RegEdit Find, searching for "Avast4":
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Automatic VPS update\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Automatic VPS update\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Detection of suspicious message\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Detection of suspicious message\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Mouse over the simple user interface button\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Mouse over the simple user interface button\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Other malware found\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Other malware found\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Simple user interface button pressed\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Simple user interface button pressed\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Task done\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Task done\Lands0
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Virus found\.Modified
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Avast\Virus found\Lands0
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore\d8a4f2b0_0
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\aswSP\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Antivirus\avast!
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\services\aswSP\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\services\eventlog\Antivirus\avast!
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\aswSP\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Antivirus\avast!
HKEY_USERS\S-1-5-21-1963773873-535440688-1456871427-1000\... (All the HKCU items are "mirrored" in HKUS.)
Edit: the registry finder in version 1.4.1.128 finds all the keys found by RegEdit.