I don't use emulators, they are slow, buggy and ineffective. Although my computer is really fast enough (Win64, i7 4770 @3.4GHz with 16Go RAM and an nvidia GeForce GTX 660 with 2Go Ram, 2xSSD and 4xHD @7200rpm )
I build the app and upload it on my devices. I have 8 different devices to test on Android (with 4.2.2, 4.4.2, 5.0, 5.1, 6.0 and 7) .
For info, Fernando has solved the problem.
He may explained it better than I on what was the issue, but form what I understand, It comes from me having multiple Fusion products (dev, free, steam), and thus, multiple enties in the Windows registry.
The GPG connect mfx file seemed to search in only one registry location and coudn't find my correct android/ant location because of the lack of setup in the one where it was searching.
Thanks for the help !