I don't think the hell has freezed and my computer is still below the desk, but I used my day at work to figure this out and I'll write it down here so that maybe someone else doesn't have to. I don't know if this is the right way, but by googling I found some direct links and I got it working.
1) Create an account at mapbox.com, the free license will do
2) Go to https://www.mapbox.com/studio/ On the right you will see Acess token, your default acces token is:, and a long code below it. Copypaste the code to notepad or wherever
3) Go to https://www.mapbox.com/editor/ Select preferred map type in left upper corner (satellite or emerald were the best for me to see the terrain) and click save at the top of the screen
EDIT 3.12.2016: That page tells it will change in 31.1.2017 but the maps made earlier will still work. The will propably be also some changes to the map creating process, we'll see.
4) Go to https://www.mapbox.com/studio/classic/projects/ and you will see your map ID (yourusername.xxxxxx)
Now, in Plan-G, insert Mapbox ID, the one you got in part 4^, and Key is the token which you found in the part 2^
Exit Plan-G, restart it and you should be ok
1) Create an account at mapbox.com, the free license will do
2) Go to https://www.mapbox.com/studio/ On the right you will see Acess token, your default acces token is:, and a long code below it. Copypaste the code to notepad or wherever
3) Go to https://www.mapbox.com/editor/ Select preferred map type in left upper corner (satellite or emerald were the best for me to see the terrain) and click save at the top of the screen
EDIT 3.12.2016: That page tells it will change in 31.1.2017 but the maps made earlier will still work. The will propably be also some changes to the map creating process, we'll see.
4) Go to https://www.mapbox.com/studio/classic/projects/ and you will see your map ID (yourusername.xxxxxx)
Now, in Plan-G, insert Mapbox ID, the one you got in part 4^, and Key is the token which you found in the part 2^
Exit Plan-G, restart it and you should be ok