Hi Christopher,
Thanks for your interest.
The issue in Selector.cs was due to me building with VS2015 (and so using C# 6.0). I've fixed that and explicitly set it to target C# 5.0.
The database file issue was a hangover from a previous database system I was using for it. Apparently that one automatically created the path, but LiteDB doesn't.
I've fixed both and pushed both changes to Github. However, in testing against a different Mattermost server, I've found a few more errors. That's what I get for only testing against a single server!
It should run and load up the login screen, but you might not be able to successfully log in to any server. I will fix that ASAP, but it might not be tonight.
Thanks,
Stephen