Either black screen or no database - how to make it work

[SteZe 0]

I recently purchased the GTN750 for my procedure training with either X-Plane 11 or 12. At first it showed up (yeah only popup no 3D cockpit integration but fine by me) but did not have any valid database. Apart from that it seems to work as it should but hard to tell without maps, charts or procedures in the database. Twisting frequencies etc seemed to work.

Then I ran the Garmin trainer software. Same problem: no valid database. I saw the update to version 6.72 there, ran that and ended up with a valid database in the Garmin trainer and could use it there to create FPL and load procedures etc. But then, it only showed a black screen in X-Plane 11 and 12 so again, unusable 😞

After some investigation I read that reinstalling it and not updating to Garmin 6.72 is the solution to the black screen. So I did that. Yeah, it now shows up in the popup windows in X-Plane again. But of course I'm now there without database so I can see it but its unusable for navigation. 

What am I doing wrong and why is it so difficult to make such a product work as plug and play experience these days? The whole buying experience itself felt like from the 80'ties by the way, requiring you to switch off your Windows firewall and stuff, copying around license key after that. Anyway, I'm pretty close to hand it back to RXP and request my money back. A pity as I would need to the GTN750 now for my current IFR training and flight preparation.

Thanks in advance,
Stefan