Device (Mac) still registered but GO doesn't think it is...

Hi there,

I'm hoping this is something you can help me with : We have Sky GO Extra and there are 4 devices currently registered. 2 of them are Macs (mine and my wife's - they are the only 2 Macs we have had and that have accessed Sky GO so there's no chance I'm using the 'wrong' one :-) )

When I try to watch any content I get the error saying that max devices are registered.

On the devices page I can see that an Ipad, an iPhone and 2 Macs are registered. But I can't watch from my Mac.

Any suggestions? I can't simply unregister and re-register as a device was already added this month.

Using the latest OSX 10.11.4 and Safari 9.1

thanks

Tim