As @Ed Sause mentioned, that was me. You are probably experiencing issue due to either missing Microsoft .NET Framerwork, installation of said framework in WINE or using a 64 bit WINE prefix (you need to use 32 bit one for the .NET Framework to install in WINE). With the exception of a few minor bugs that consist of having to double click status menu buttons and sometimes wrong price calculations the calculator is working flawlessly under WINE.
I have tried several times to install, but "WINE" does not like it. My OS is Ubuntu. I was wondering if you could recompile in a .DEB format, please. I would love to try this calculator out.
Here are the instructions, paste this in Terminal (replace 'dnf install' with the install command for your distro):
1. su
2. dnf install wine
3. dnf install winetricks
4. exit
5. WINEARCH=win32 winecfg
7. winetricks dotnet 46
8. wine /home/user/Downloads/Setup.exe //input the actual directory of the Setup file
9. exit