Launch Tribes.exe for original tribes version 1.11. The game resolutions are for old monitors.
Launch tribes130-v-ws.exe for widescreen support version 1.30 with 1920x1080 as the default resolution.
Edit game resolutions for the tribes130-v-ws.exe in config/autoexec.cs file.

If you are having trouble with opening the game correctly or being able to use the mouse in the game window try these:

Troubleshooting the .exe:
1) See the included TribesExeProperties.png picture to see what settings to apply to the tribes.exe
2) Open the windows Control Panel, open the Mouse settings, click on the Pointer Options tab, ensure that the Enhance Pointer Precision check box is unchecked. 

Change game resolution?
We are making use of a widescreenfix.dll for Tribes which allows us to use larger resolutions like 1920x1080.
If you want to edit the resolution don't do it in Tribes.
Instead navigate to the config folder and open the file autoexec.cs
Edit the values for: 

$WSWidth = "1920"; 
$WSHeight = "1080"; 

And

$pref::VideoFullScreenRes = "1920x1080";

In the autoexec.cs is also where you can edit your Fov if you want to increase it beyond 90, the default Tribes setting.
$pref::PlayerFov = 90;