Hi Goto,
You should be able to do the following, although it doesn't really seem to be working for me :(
Log into the appliance via ssh or physically at the console and run the command 'http on'. Now run the command 'service controlcenter restart'. When the service is running again you should now be able to log in using http, the standard http port(80) and not (41080). Login to the appliance, change the certificate settings back to the way they were and save them. You should now be able to shut http access off the same way you turned it on and you should be back where you started.
Let us know how it goes for you, if it doesn't work out there might possibly be a bug with the command...
Kevin