Hello,
I use an usb token with an EV Code Signing certificate on it in order to sign the programs I write.
It all ran fine until v15.0.3.
After upgrade to v15.0.4, my certificate aren't recognized anymore.
So I restored Windows to previous system restore point, and got v15.0.3 back again and it now runs fine 
I won't ugrade to v15.0.4, but I hope that next versions will solve this !
If you encountered the same, please tell me if you found a way to solve this !
Thanks a lot.