Bumka: Thank you, I found that export 
 HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\1440426004_is1 
 need for 2 keys: 
 1) HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\ 
 Windows\CurrentVersion\Uninstall{3D9CF3CA-3AB0-4A82-9853-D7C43FD1D775} 
 2) HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\ 
 Windows\CurrentVersion\Uninstall{6A09EC92-016B-4032-8CF1-6840B20C254A} 
 So, there is editor for main game and for addon, yuhooo )  
 For RDA files I use tool "anno 1404 RDA explorer" (can't post links here yet) 
 Try it with GOG-version and it work 
  Thanks for the information.  
 I have tried that and although it allowed the installer to run, the tools were not actually installed - the shortcuts pointed to dead ends and the tools were not placed in the Anno 1404 Gold Edition/tools directory.  
 However, I got it working by making the following changes to the register:  
 1. Open HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Ubisoft\Anno 1404  
 2. Create a new key called GameUpdate, like this: 
 HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Ubisoft\Anno 1404\GameUpdate  
 3. Select the GameUpdate key and create two new string values (type REG_SZ):  
 NAME = execpath VALUE = The complete path to the anno4 executable file 
 EXAMPLE -> X:\anno_install_folder\anno4.exe  
 NAME = installdir VALUE = The complete path to the folder in which Anno4.exe resides 
 EXAMPLE -> X:\anno_install\folder  
 After adding the entries above and running the editor installer again (after removing the faulty install, naturally) both ToolOne.exe and WorldEditor2.exe (with their respective .bat files) were correctly installed in the anno 1404 Gold Edition/tools directory.  
 Just thought I'd add this information in case someone else is facing the same problem.