Thank you for writing me about this! Can you help me find what's failing?
If you open your Windows Explorer and navigate to %appdata%/ArvieFlar there should be logs. If you could send me the log file, I will be able to investigate the issue.
I don't have a sound output connected to my PC - [ERR] Executing action #82 for geoscape initialization Microsoft.Xna.Framework.Audio.NoAudioHardwareException (0x80004005): Audio has failed to initialize. Call SoundEffect.Initialize() before sound operation to get more specific errors. 2nd error is the same, from a different place:
Microsoft.Xna.Framework.Audio.NoAudioHardwareException (0x80004005): OpenAL device could not be initialized, see console output for details. at Microsoft.Xna.Framework.Audio.OpenALSoundController..ctor()