No main menu, and it seems to be just me.

Since Update 10.1.0 a connection problem to our servers or our servers having problems does no longer show a empty main menu, but a detailed error message with helpful information. The only remaining known reason for a empty main menu that is not yet caught in the released version is a connection issue with Steam. If you have an SLG account linked to Steam you could try using the client of our website with direct log in, that doesn't use Steam.

Typically restarting steam does help for that problem, otherwise the amount of potential causes is just as high and hard to diagnose as for any other connection issues - something is going wrong between local network and Steam connection manager.

I'm sorry, in that case you will need to reach out to [email protected].

It being the last remaining known cause doesn't mean there couldn't be any others that need a deeper investigation that isn't possible via Steam, especially given this seems to have happened without any update to Eco or anything else.