Hello, people...
I've spent my entire weekend to build a simple GUI for SoPDF...(Still learning C#)
And then I've found there are already a bunch of nice GUI tools (including Excel) presented in this thread.
Anyway, I'm posting mine...
It's written in C#, so that .Net Framework 3.5 should be pre-installed.
Also GUI executable (SoPDF GUI 091215.exe) should be in the same location with "soPdf.exe".
Compared to frabjous's work, mine is quiet immature, just try it for fun...
Update on 09/12/15: GUI can be run with Options containing Space Characters.
http://mycyclopedia.tistory.com/207