[Mono-list] Monodevelop doesn't start :(

[=?UTF-8?Q?Szentp=E1li_J=E1nos?=]

When I try to start monodevelop I get the following error (of course the 
app quits instantly):

--- START ---

Unhandled Exception: Mono.Addins.Setup.InstallException: Application not 
found: IDE
  at MonoDevelop.Core.ApplicationService.StartApplication (System.String 
appId, System.String[] parameters) [0x00000]
  at MonoDevelop.Startup.SharpDevelopMain.Main (System.String[] args) 
[0x00000]

--- END ---


My questions:
- does anyone know what is going on?
- how can I make it not complain about MOZILLA_FIVE_HOME... for I have 
no Mozilla installed and I don't intend to. I currently set it to '/'

János