I'm not sure if anyone else is looking for a solution to this, but I've kind of found one. I exported the maps into WCS format in Ekahau, and spun up a VM with Airwave 8.0.3 running. I was able to import the maps using 8.0.3 and then export them into VisualRF format and import them into the latest version of Airwave... It appears just the WCS import function is broke in the latest versions of Airwave. It is kind of a long way around aproach, but for someone not wanting to have to redraw maps in VisualRF it saves a lot of time.