when migrating from RTB to BLG on a server (as in deleting RTB completely and adding BLG instead), your RTB preferences will reset but your main server settings such as title, password, e-tard, etc and admin lists will remain --
from that point forward, any preference changes made through BLG's server preferences interface will persist.
if you can't be bothered to just change back your settings when you migrate, you can try overwriting the contents of
config/server/BLPrefs/prefs.cs from
config/server/rtb/modPrefs.cshaving both RTB and BLG on your game's client is fine, but while hosting a server I can't really advise having both systems at the same time (although I can't see why you would want to since we're trying to move away from RTB completely).
alternative to all of the above, below:
if you are a
dedicated server operator who wishes to use functions such as
registerLoadingScreen and also want to allow Glass users to view your server's player list, but
do not wish to use Glass' server preferences system, we have a Glass-Lite distribution available.
Glass-Lite does not have any client functionality and is intended for dedicated servers only, it won't run if it detects a full BLG installation instead.
https://github.com/BlocklandGlass/Glass-Lite/