Serviio

After installing 1.5.1 (windows), I still get the "there's a more recent version" message (and Serviio console still shows 1.5).

Yes, I rebooted.

By the way, the log shows:
Serviio DLNA media streaming server v 1.5 (rev. 19ceb8acec8c)

Looks like for some reason the install didn't work. Your console will also say 1.5.1 after a successful installation.

If you haven't tried yet, run the install again. Perhaps make sure it's not transcoding something when you do it, just to make sure it isn't blocking the install.