How to change your Terraria's server version
You can change your Terraria server version easily via the Configuration -> Startup page on your Terraria server.
It is recommended that you make a backup before changing your Terraria server's version. See here for instructions on creating a backup.
Go to Terraria Fandom and find the version number you wish to install.

Head on over to your server's Configuration -> Startup page and replace the current Terraria Version property value with the version number you wish to run on your server. (eg. 1.4.4.9)

Once saved, go to Configuration -> Settings and click the Reinstall server button. Don't worry, this will only replace the version dependant files.

You can now start your server server and enjoy the version change.
It is recommended that you make a backup before changing your Terraria server's version. See here for instructions on creating a backup.
Go to Terraria Fandom and find the version number you wish to install.

Head on over to your server's Configuration -> Startup page and replace the current Terraria Version property value with the version number you wish to run on your server. (eg. 1.4.4.9)

Once saved, go to Configuration -> Settings and click the Reinstall server button. Don't worry, this will only replace the version dependant files.

You can now start your server server and enjoy the version change.
Updated on: 31/05/2023
Thank you!