Hi Brian,

> I was wondering if you are using Visual Studio 2012, or 2013, or
> 2015? As C++ compiler with Qt5...

I'm using Visual Studio 2013 and XCode 4.6.3 for the new rewrite. Previous versions were done using Visual Studio 2003.


> I would guess that the commercial version of Qt5 cost $ ?

I'm using the open source Qt version. There is a commercial version of Qt but also the open source version can be used for commercial projects as well since a few years ago they switched the license to LGPL instead of only GPL.

- Michael