plugin won’t remember server ip

Just downloaded kodi, and trying to configure the DVBLink plugin. I press configure, enter 127.0.0.1, leave the port at 8100, and no user/password. I press OK. Run is disabled, and when I go press configure again, the server field is blank.

Am I doing this wrong?
Can I do it by editing some text file?

My platform is Windows 7 32-bit, kodi is 17.3 May 24