In the Settings section under Login you have to enter your account information which contains a User name (must be a valid mail address) and your Password you get by mail after creating your own account. You have two possibilities to get your own account.
First you can download the Windows version of the software form www.flightmanagement.ch under the Download section. The section option is the ROTAIR Web interface which you can access via: http://rotair.no-ip.info/ROTAIRWeb there you can create you own account too.
After changing any of the Settings you have to tap on the Save Button.