Prefer Steam/GOG path for C&C, to suppress error about game not being installled properly - #31

What was happening:

1. user installs game and DLCs from both Steam AND EA App (note: it doesn't matter if EA version was uninstalled, as it leaves leftovers, unless revo is used)
2. steam silently overwrites the registry path for datadirs on every single game launch, thus "fixing" the most obvious problem with multiple installs
3. user thinks everything is fine and working, as game works fine without LK, but LK throws an error telling users that their game isn't installed properly (because it technically isn't)

I don't care to send users through the whole revo uninstall process for this, so instead, we just prefer the Steam datadirs, and pretend that the EA leftovers aren't there. It's a dumb solution to a dumb problem, but this should suppress the error