I installed Steam and Quake Live in CrossOver, and then I subscribed to the SteamServerBrowser. It downloaded correctly and the ServerBrowser.exe is in the workshop folder but I don't know how to launch it. Double-clicking it does nothing.

Any suggestions?

If I use the 'Run' command in CrossOver/Wine in a WindowsXP bottle, I get the following error: 'There is no Windows program configured to open this type of file.' There is an additional error in the log: 'Command error text:
winewrapper.exe:error: cannot start L'ServerBrowser.exe' (error 31)'

The Server Browser is a .NET 4.0 application.
You need to install the Microsoft .NET Framework 4 Client Profile (or Full) to run it. It's preinstalled on modern Windows OS, but Wine probably has none or only an old version.

I don't use Linux, so I can't really help you much with this. You probably just need to install this:
https://appdb.winehq.org/objectManager.php?sClass=version&iId=17886

Sadly, installing the Microsoft NET 4.0 framework didn't help. There must be some other dependency that's needed. Oh well, I'll stick with the Steam QL default match browser when using CrossOver. Thanks.

A 1 month ticket, but try to install through these steps:

1. for creating wineprefix:
   WINEPREFIX=~/.winenet WINEARCH=win32 winecfg
2. for installing .net:
   WINEPREFIX=~/.winenet winetricks dotnet20 dotnet30sp1 dotnet35sp1 dotnet35 dotnet40
   3.a) you can install steam:
   WINEPREFIX=~/.winenet winetricks --no-isolate steam
   3.b) or you can download Steam Server Browser manually and run with this command (be sure, that you are in the right directory):
   WINEPREFIX=~/.winenet wine ServerBrowser.exe

I still not sure if it helps, and can't test, but you can try.

I got it working with vanilla wine after installing winetricks dotnet40 and pressing OK when wine prompted me for the mono and gecko installations.

As a side-note, this application is pretty impressive, especially for arena FPS.