I have a .torrent file without any trackers on it and I have the peerlist in a .txt file, It seems that I cant add them manually (If you're gonna make this feature, please make it adding in bulk like qbittorrent, not one by one like utorrent) Thanks!

you can add peers, but only one at a time.

look in the peers section:

https://support.tixati.com/transfer%20properties%20-%20options