All of our servers come default loaded with the latest version of PaperMC, but you may want to change that, that's completely fine!
With **most** versions, all you need to do is replace the .jar file!
For reference and example purposes only, we will be demonstrating with Purpur.
Download the the new jar file, for example you would download purour from https://purpurmc.org/download/purpur
Open your MintraNodes server
Go to the file manager
Delete the existing server.jar
Import/Add the new jar file, and rename that to "server.jar" if you haven't
Restart your server
Note: if you plan on running completely different architectures like Pocketmine-MP or Forge, you may need to contact our support team to handle that for you!