Thanks everyone that donated, the new version is made. You cannot join the server if your game version is not updated and the FOV slider cannot be used.
For players, all you need to do is download the new version (1.0.8.0 or later) and replace your existing files -
https://forums.taleworlds.com/index.php?threads/warband-script-enhancer-2-v1-0-8-0.384882/For server hosts wanting to use the feature to prevent FOV alterations via WSE2, you must install WSE2 onto your server (this has no effect on those not using WSE2) via the following instructions, found on the WSE2 thread:
"Dedicated Server
1. Download WSE2
2. Extract WSE2 files in dedicated server folder
3. Edit server_config.ini for server specific options
4. Run bat file. Example: start mb_warband_wse2_dedicated.exe --config-path server_config.ini -r Native.txt --module Native"
Then, to enable the FOV limit you must:
"Edit server_config.ini and set
iMultiplayerEventForAnnounce=105
bServerLockFov=true"