Too difficult for connect Plang-G on FS2020! But very easy with "FligthShare" or "FSTramp".
I hope that you find an easy solution for your soft (thank you for it.)
I will continue with Plan-G on that old fellow FS9, because I can fly to the many airports I created
(see : https://claude-roure.webnode.fr/flight-simulator/)
Good job.

Many thanks Tim. I founded it; so : FS2020 data created
But : can't connect... 
I created :
1- new inbound rule with firewall.cpl (TCP... port 4504...)
2- Simconnext.xml as read on the forum, into C:\Users\[Your Name]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\   with Address=192.168.1.69 & Port=4504
3- Simconnect.cfg in Plan-G v4 with same Address=192.168.1.69 & Port=4504
(but not sure than 192.168.1.69 is the good Adress for FS2020; it seems to be my PC address - where find IP of FS2020?)
So : "Simconnect" not visible on Plan-G.
Such a pity...

sorry... I can't find were download the beta Plan-G v4