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After setting up your free server, you will need to wait 24 hours in order to continue setting up the server. After 24 hours, log back into the vps.me website and click the "My Servers" tab. You can either choose a FTP client like Filezilla or a SSH client PuTTY.In this section we will be using PuTTY. This will allow you to connect to the server via command line and perform any configuration. Click the "SSH" option in the "My Servers" tab. This will open a pop-up with the SSH connection information. Copy the IP address displayed, and then open PuTTY. In the Session section, enter the IP address you copied into the "Host Name" field. In the "Port" field, enter the number after "-p" from the SSH pop-up. With the server's address and port entered, click the Open button in PuTTY. You will be warned that the host key is not cached in your registry. Click Yes to proceed. You will be prompted for login information after you connect. Enter root as your username, and then the password you created when you signed up for your account. If you can't remember the password, click the "Root" button in the "My Servers" tab to enter a new password. You can use the command line to edit your Minecraft server settings. Once you are connected to the server, type nano minecraft-server/server.properties to open the server properties file. You can then edit the properties so that the server is to your liking. Find the -Xmx entry in the server settings and change it to -Xmx384M. After making the changes to your server configuration, you will need to restart the server. Return to your vps.me dashboard and click the "Reboot" button at the top of the "My Servers" tab. After the server reboots, you and your friends can connect to it!

Summary:
Wait 24 hours. Choose how you want to edit server files. Download the PuTTY SSH client. Enter in the server information. Connect to the server. Log in to the server. Open your Minecraft server settings. Restart your server.