PMDG 777 External EFB (aviaworx) not displaying charts

In the PMDG 777 EFB I can connect to Navigraph and peruse the charts with no issue. My problem is when I put the EFB on my external ipad via ariaworx efb, the charts wont display.
I get a message “Navigraph Terminal Charts cannot be viewed on this device due to license restriction”
I spoke to Mark Foti from ariaworkx and he said it was a PMDG issue, I asked in the PMDG forum and they said “This is due to licensing reasons with Navigraph. Charts can be only viewed via the plane EFB unit.”

Is there any workaround for this issue?
Many Thanks