The DYN Launcher closes as soon as I log in

If the DYN Launcher opens successfully and you were able to login to the launcher, it should have started the auto-update feature.

If the auto-update feature doesn't run or if it just downloads an updater.jar file and stops, try the solution below.

1. Download and install the proper Java Development Kit (JDK) from Oracle.
• Found here.
2. You'll need to accept the license agreement.
3. Once you accept the agreement, download the file (in the red border) that is correct for your operating system.
• 
4. Once it's downloaded, run the file and follow the installation prompts.
5. When it's done installing, close all instances of the DYN Minecraft Launcher.
6. Re-Launch the DYN Minecraft Launcher file.

If that was the issue, the DYN Minecraft Launcher should run and download the required DYN Server Mod once you've logged in.