Can't start a cmd.exe shell with ConEmu

I've installed ConEmu on a Windows 10 64bits machine. It worked fine for a few hours. But today, while trying to start a simple cmd.exe shell, I get two errors message.

1. in a dialog box, it says that

   16 bits application is not supported. Impossible to start or execute the program "\??\C:\Users[MyUserName]\cmd.exe" because it is incompatible with 64 bits version of Windows. Please contact the software editor to … bla bla bla.

2. In the ConEmu terminal, it displays the following :

   Can't create process, ErrCode=0x000000D8,

   Description: Cette version de %1 n’est pas compatible avec la version de Windows actuellement exécutée. Vérifiez dans les informations système de votre ordinateur, puis contactez l’éditeur de logiciel.

   Current directory: C:\Users[MyUserName]

   Command to be executed: "C:\Users[MyUserName]\cmd.exe" /k "C:\Program Files\ConEmu\ConEmu\CmdInit.cmd"

   Press Enter or Esc to close console, or wait...

What's Working:

• cmd.exe is OK if started standalone (aka [Win]+[R])
• Other shells, commands or apps inside ConEmu are doing just fine (PowerShell, PuTTy, CygWindows, notepad++, etc.).
• I can also start cmd.exe just fine from other shells (Powershell and CygWindows) inside ConEmu.

I tried to remove it completely, cleaning the directory, including clink addon and xml settings files in %APPDATA%. Still the same issue.

I'm no Windows expert. Do you have any idea where that might come from ?

Reinstall ConEmu

1. Remove registry (download Microsoft Fix it utility and clean up registry)
2. Uninstall from control panel
3. Then Install