Turns out it was my router being a bit over zealous rather than a windows or app problem, solved it by forwarding the ports the app and live communicate on… job done…
Mine connect fine on my home router but not in my studio. Any tips?
First thing to try is putting your iPads ip address in the host field in the max device, that worked for me but was inconsistent, sometimes it would connect other times it would hang, next step is go into your routers admin page and look for the advanced settings page, go to the firewall section and there should be a section to add a port forwarding rule, you need to select the device that you want to allow traffic to and for the port range 2436/2437 on both the internal and external ports… that’s what worked for me… also my router had extended upnp protection switched on so I disabled that, all routers have different settings available so ymmv…
Had a chat with Zack the guy who made the app earlier he was super helpful, real nice guy, if all else fails you can email him and he’ll do his best to help you… there’s a contact email address on the knobbler web page 
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@binaural any chance that this would happen? seems perfect but I would like to mix the faders with buttons for example?
You should ask Zack about stuff like this, I’m not in the position (nor do I have the technical knowledge 
) to answer. Zack’s busy perfering the system constantly btw.