It's at www.kikeg.arrakis.es/winabx/winabx.zip
Any comments or suggestions are welcome.
Edit: updated download path.
Also, I'm aware that there are same bugs related to not properly opening a wave file at the beginning of the program, I'll fix them when I have some time. Also, don't get mad trying to change A and B wave files once the program is running, with this version now you just have to close the program and run it again to select new wave files. Sorry