Removing routing assemblies

I have a routing assembly which was created using SW Premium, which includes the routing plugin.

However, I am currently rebuilding the assembly so without any routed cables, so that it can be used/edited in SW professional (without the plugin)

All cables have been deleted, and any features/configurations to do with the routing have also been deleted. However, I still can't move any of the components since it keeps telling me that 'the components has been defined in the context of a routing assembly and can't be moved'.

How can I changed the file-type of the assembly so that it becomes a 'normal' assembly again?

Thanks,

Tom

SolidworksAssemblies