Default directory for initial WSDL

Echo off

set SOAPUI_HOME=%~dp0
if exist "%SOAPUI_HOME%..\jre\bin" goto SET_BUNDLED_JAVA

if exist "%JAVA_HOME%" goto SET_SYSTEM_JAVA

echo JAVA_HOME is not set, unexpected results may occur.
echo Set JAVA_HOME to the directory of your local JDK to avoid this message.
goto SET_SYSTEM_JAVA

:SET_BUNDLED_JAVA
set JAVA=%SOAPUI_HOME%..\jre\bin\java
goto END_SETTING_JAVA

:SET_SYSTEM_JAVA
set JAVA=java

:END_SETTING_JAVA

rem init classpath
set OLDDIR=%CD%
cd /d %SOAPUI_HOME%

set CLASSPATH=%SOAPUI_HOME%soapui-5.6.0.jar;%SOAPUI_HOME%..\lib\*
"%JAVA%" -cp "%CLASSPATH%" com.eviware.soapui.tools.JfxrtLocator > %TEMP%\jfxrtpath
set /P JFXRTPATH= < %TEMP%\jfxrtpath
del %TEMP%\jfxrtpath
set CLASSPATH=%CLASSPATH%;%JFXRTPATH%

rem JVM parameters, modify as appropriate
set JAVA_OPTS=-Xms128m -Xmx1024m -XX:MinHeapFreeRatio=20 -XX:MaxHeapFreeRatio=40 -Dsoapui.properties=soapui.properties "-Dsoapui.home=%SOAPUI_HOME%\" -splash:SoapUI-Spashscreen.png

if "%SOAPUI_HOME%" == "" goto START
set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.libraries="%SOAPUI_HOME%ext"
set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.listeners="%SOAPUI_HOME%listeners"
set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.actions="%SOAPUI_HOME%actions"
set JAVA_OPTS=%JAVA_OPTS% -Djava.library.path="%SOAPUI_HOME%\"
set JAVA_OPTS=%JAVA_OPTS% -Dwsi.dir="%SOAPUI_HOME%..\wsi-test-tools"
rem uncomment to disable browser component
rem set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.browser.disabled="true"

:START

rem ********* run soapui ***********

"%JAVA%" %JAVA_OPTS% com.eviware.soapui.SoapUI %*
cd /d %OLDDIR%0o +++

Here you get the content of the file soapui.bat.