Switch pro controller compatibility issue

Hello everyone, and thanks for sharing this beautiful project, which sure cost tons of work. 

My PC's specs are as follows:

Windows 7 Pro SP1 64bit

Intel Core i5-4570S 8 GB RAM @ 2.90 Ghz

The RPCS3 build I'm running is 0.0.10-10516-3d3c91d6 Alpha, which is the latest one (I just downloaded it and it tells me it's up to date).

Even though the PC is not recent, and Win7 may be updated to 10 (I run it on BootCamp on an iMac) I had experienced an issue with portable hdd not opening when I updated the OS on an earlier model. I cannot run the risk just for an emulator.

So, here's my problem, a small one to be sure:

I would like to play the games I dumped, using a Switch Pro Controller. I tried to run the .bin file on Steam, but it indeed requires Win10, so I left that for later.

Thus I opened RPCS3, I went to the 'Pads' settings, selected MMJoystick handler (with the Switch Pro Controller on and synched) but, even though the buttons were customizable, pressing them on the pad gave no result (drivers are updated and Windows recognizes the device in the 'Devices and Printers'). Selecting XInput has the input buttons grayed out.

Does anyone have an idea about what I'm missing/neglected to do?

Thanks in advance!