How to Change Server Versions

First Step

Download the Forge Installer

Second Step

Run the Installer and click Install Server and change the location of where you would like the files to be extracted into.

Third Step

Head over to the folder of the server files.

Fourth Step

Head over to the location: \libraries\net\minecraftforge\forge[server_version]

Fifth Step

Copy the unix_args.txt file and paste it in the folder where you extracted all the forge files into.

Sixth Step

Select all the files in the folder, Right click and Send to compressed folder.

Seventh Step

Head over to your Wepwawet Panel

Eighth Step

Click on your preferred server, Head over to the Files tab and delete all the files and upload the zip file you created in the previous step.

Ninth Step

Unarchive the uploaded zip file.

Tenth Step

When the files are done archiving, Copy the name of the .jar file.

Eleventh Step

Head over to the Startup tab and paste the name of the .jar file in the SERVER JAR FILE field.

Twelfth Step

Head over to the Console tab and hit the Start button.

Thirteenth Step

Accept the EULA and the server will restart automatically.