Pre-Release 4.2.0-beta2
This release actually includes the commits to enable Steam and Epic
authentication.
NB: The correct form for the runas command is as follows:
runas /user:<USER> "\"c:\Program Files (x86)\EDMarketConnector\EDMarketConnector.exe\" --force-localserver-for-auth"
If anything has messed with the backslash characters there then know that you need to have " (double-quote) around the entire command (path to program .exe and any extra arguments), and as a result need to place a backslash before any double-quote characters in the command (such as around the space-including path to the program).
I've verified it renders correctly on GitHub.