We don't document minor changes (when the third digit is changed), those
changes are insignificant, and if the program works for you, you don't
need to upgrade when only the third digit is changed. It is recommended to
upgrade only if the first or the second number changes.
There are still versions 3.0.0 in the program and the help file because we
didn't recompile the program or change the help file when releasing
3.0.3 - we used stuff from version 3.0.0. Actually, the difference between
3.0.3 and 3.0.0 is that PHP is downgraded to 5.2.5, welcome.php is fixed
and one link is fixed.
You can see that if the actual version you are installing is 3.0.3 in the
beginning of the installation, when it asks if to install ZZEE PHP GUI
version x.x.x on your computer.