You can enable this setting back in INI file. It is located at

for Windows 7:

C:\Users\<UserName>\AppData\Roaming\ScanWorks\RemoteTwain\RemoteTwain.ini

 

for Windows XP:

C:\Documents and Settings<username>\Application Data\ScanWorks\RemoteTwain\RemoteTwain.ini

 

Please change <username> to your username that you are logged. E.g . for administrator this will be for Win 7: C:\Users\Administrator\AppData\Roaming\ScanWorks\RemoteTwain\RemoteTwain.ini

 

In ini file change this line

AlwaysShowUI=0

To

AlwaysShowUI=1

 

It will enable showing RemoteTwain configuration dialog again.