Hi again,
in the meantime I managed to learn a few more things about Aris. Now I know that copy-paste works with Shift-Del and Shift-Insert, that's OK. :-) Also I managed to make a fork (a copy) of Aris at https://github.com/kovzol/aris and added some support for compilation with cmake. Now aris successfully compiles on Ubuntu Linux 18.04 and Windows 10/MSYS2 64 bit.
I still have some problems on Windows: Aris runs nicely when I start it from CLion (the reason I added cmake support was that CLion works with cmake), but has the same problem when I run the executable outside CLion. I am not an expert of cmake, so I may need to play a bit to collect the required .dll files and ship them together with the .exe. Also, I found a way to avoid crash when opening/saving a file: https://stackoverflow.com/questions/28953925/glib-gio-error-no-gsettings-schemas-are-installed-on-the-system, but the file is still not loaded properly with this fix (I get an empty document). Anyway, this seems to be an issue that could be fixed hopefully quickly.
On the other hand, the icons are also missing when I run aris.exe outside CLion. I'll search for a fix here also.
The freshly built aris.exe looks nice, it is very similar to the Linux version. Maybe the main window should be a few pixels wider to avoid overlapping of the right column of the rules by the slider:
This is a problem on both platforms (here I attached the screenshot of the Linux version).
Best, Zoltan